1 MOA sten?

>>32446195
It's time to stop.

File: IMG_2415.gif (2MB, 817x537px) Image search: [Google]

2MB, 817x537px

>>32446195
Did you base this off of a design or do you have the skills to DIY?

File: 20161226_133403.jpg (3MB, 4032x3024px) Image search: [Google]

3MB, 4032x3024px

>>32446195
100 yards, 32 rounds, unsupported kneeling position. Obviously my optic is a bit off, but this group stunned the shit outta me. I never thought a sten variant with a barrel that can rotate freely in its bushings could ever pull this off.

We are clocking the 115 grain 9mm fmj el cheapo american eagle ammo we put through it at 1700 FPS.

we need more testing but I think with +P we could possibly hit 2000 fps or higher.

This essentially means that its hitting more like a .357 than a standard 9mm at handgun velocities.

We are very unscientifically placing it at juuuust outside 1 moa, we will need to get a shooting bench, vice, and do actual math, but I think I might have built something truly unique here.

>>32446214
I kinda made it up as I went along.

>>32446195
>>32446229
Fucking beautiful.

File: Handmade22PoacherSilencedGun.jpg (107KB, 997x440px) Image search: [Google]

107KB, 997x440px

>>32446195
how much does it way?
It's worthless if it's made of metal and not composites.

File: IMG-20161226-WA0010.jpg (248KB, 760x1600px) Image search: [Google]

248KB, 760x1600px

A bit better of a close up, when I finished it originally we had a lot of feed issues.

We dicked around with EVERYTHING for MONTHS and couldnt get it to cycle reliably.

Sometimes it would go through a mag no sweat, others you couldnt hardly get it to chamber or eject.

Found the problem was 2 fold.

1st, our extractor from the parts kit was chipped, upon replacing things improved somewhat.

2nd, we found that sten mags had utterly shit quality control. Some were 100% fucked up bullshit the day they were made, others are just fine. Bought a few more, experimented, and found 2 decent mags.

Now it will cycle reliably, it still tends to fail to feed the last round in the mag every so often, but we think thats just a quirk of the mags.

I plan on building another one modified to feed from uzi mags or colt smg mags, I think it will vastly improve the reliability.

>>32446195
How did you do the semi conversion with a dremel?

I would be very interested in a series of videos or maybe a document about extreme poorfag building of a sten

>>32446239
Please save /K/ sten sniper anon before the pepe liberator anon sells a bunch of pipe bombs to half of /k/ who will procedes to blow themselves up with them.

>>32446314
I am planning on starting a youtube channel soon.

My plan is to develop this idea farther into something I can sell, I will faithfully document the process of the next build and announce it on here.

Hopefully by the end of next year I will have finished developing this idea, then I can start trying to figure out licensing, manufacturing, and distributing on at least a limited scale, maybe make a test batch of 20 or so.

Idk, hopefully I can get these on the market in another 2 to 3 years. Still to early to call pricing but im hoping to be able to do it at $400 to $500 range.

I built it because fuck hi point carbines, and im not spending $900 or more on a 9mm carbine.

I want to build a reliable and accurate 9mm carbine that manahes not to cost a bunch but also isnt complete hipoint tier trash.

>>32446308
Perhaps you could try MP40 magazines? I believe they are the same size as STEN mags.

>>32446308
>>32446399

Thats cool in a stalker esq apco style of way.
If you can get me one for 400$, ill order. fuck it. looks cool. why not and i need a memeamillimeter

File: p_620000021_2.jpg (7KB, 400x400px) Image search: [Google]

7KB, 400x400px

>>32446451
Eh, ww2 era mags are getting expensive and hard to find.

It wouldnt take much to mill a bolt that matched a more modern magazine's feed lip profile, and to weld up a magwell that fit it.

I think colt 9mm mags are a strong contender, as they are pretty common and easy to find. Plus they will function way better and would be a bit shorter.

The bipod on this is for bench shooting and performance testing. sten mags are so damned long you cant really go prone with it, but this is a prototype so Its acceptable.

I think with the colt mags you could go hi cap with a 32 round one, or pop a 20 or 10 round one in for if you wanted to do longer range shooting in the prone.

>>32446399
$640 for PSA AR9. Uses glock mags and many standard AR parts.

>>32446308
MP5 mags, koreans make em for cheap and they work perfectly.
>>32446399
Sounds neato, if I were you I would evolve the final design into something like a tec9 that takes glock mags so you can corner the coon market

>>32446716
Well keep in mind that Im not a big multimillion dollar LLC (limited liability company) so I kinda need to target the more respectable gun buyers, even if I "won" a lawsuit the legal costs would wreck me. And the grabbers are increasingky targeting small manufacturers with their lawyers.

I think the final product will have a bushing system where you thread the barrel in. That way you can just depress the button on the rear to remove the stock, unthread the barrel, and have a rifle that you can fit in a backpack easily.

Too heavy to call a true take-down rifle, but it also isnt a flimsy inaccurate piece of crap like most takedowns, or cost an arm and a leg like the ones that actually work tend to.
Want it to be just a good general purpose light carbine that works well, shoots straight, has hi cap capability, and dont cost much, and you can even take it down and stow it in small places if need be.

Answer this please.>>32446286
>>32446286
>>32446286
How much does it weigh.
Sorry, on phone.

>>32446195
>>32446229
damn, nice work anon!

>>32446975
9 lbs 3.5 oz unloaded (including optic and bipod)

>>32447080
Addendum: optic wieghs 1 pound, and the bipod weighs half a pound, so the gun itself is ball parking at 7 pounds unloaded.

>>32446195
>>32446308

A commendable effort, but good lord the welding on the magwell is god awful.

>>32447326
Its a prototype, it aint supposed to look pretty, its supposed to work well. But yes, they were very atrociously done with a harbor freight cheap as shit wire feed welder. Not trying to blow money and time on a prototype that I didnt need to.

Manufacturing will become finer and fit and finish will be tighter as I build subsequent versions.

I think my 2nd will incorporate some internal changes and tweaks, as well as the aformentioned fix using different mags.

3rd version will be the finished product, this things only purpose was to
A) function properly
B) prove that the platform can achieve 1.5 or lower MOA

Its done those things, now its subsequent iterations will focus on prettying up and refining manufacture methods.

File: 256px-Metro_2033_Game_Cover.jpg (30KB, 256x316px) Image search: [Google]

30KB, 256x316px

>>32446308
>>32446195

>>32446195
Were you inspired by this, OP?

File: 1476909988561.jpg (49KB, 639x493px)

49KB, 639x493px

>>32447639
Forgot pic

>>32446518
PSA does two kinds of AR9 lower setups, one uses Colt SMG mags with a magwell insert and the other is milled to use Glawk-brand Glawk magazines.

File: 13220652_10206039694343970_9221364686196123971_o.jpg (225KB, 1440x810px) Image search: [Google]

225KB, 1440x810px

>>32447639
No, actually I was sitting in iraq, bored as fuck, I'd just read a book that was titled "The STEN gun" and it talked about all the various issues the original versions had (inaccurate as fuck, unreliable, broke easy) I got home on leave and rented an original in fun mode and really finger-fucked it and shot the shit out of it.

Manufacturing was rushed and materials used were c heap but the design itself is solid, the issues arent from its design. So I thought "I bet if a guy built one on his own he could fix those issues."

So I built one just for shits and giggles, and aside from the magazines being utter shit it was suprisingly straight shooting once feed issues had been corrected, especially for something with no sights on it.

I realized this wasnt just a silly tool-metal zip gun, or atleast didnt have to be, so I added a cheap charley finish (black bar-b-que paint) a rail, a bipod, and a stock and grip that wast utter shit, corrected the feed issues, and it turned out to be startlingly accurate for a tube gun cut out with a hand dremmel and shit-welded together with a bottom shelf chinese made wire feed welder.

Pic related was my initial "tool room" finish. Aka naked metal with no sights.
Pretty big contrast to what it is now.

2nd one is gonna be even better than how it sits now that im "finished" with it, im hoping the 3rd one I build will be show room quality.

>>32447140
>>32447080
Then wtf is the point

>>32447787
Bruh, next time the Pepe liberator guy gets on you should offer your services, we could use a guy like you with experience in DIY troubleshooting. It'll be for a good cause, of course, arming the American masses.

File: 1479702363291.jpg (315KB, 2048x1365px) Image search: [Google]

315KB, 2048x1365px

>>32446195
I'm pretty sure this is the /k/'st thread we've ever had. That's bad ass.

>>32447811
Is he a new tripfag?

I spent the last 4 years only able to intermittently browse /k/ so I missed a lot, but I EASed last week and now that I got the time im delving back into my hobby of tearing guns apart and figuring out how they work.

I think im gonna buy an old m2 .50 barrel from a guy I know and try to build a $250 anti matierial rifle with it.

>>32447520
Everyone knows the thing can hit at least that provided the barrel isn't completly deficient do you know what MOA means?

>>32447787
I love it OP. I always wished I was able to hand-tool a gun, I'd end up making the silliest of shit ie top-loading 7.62x25 Tokarev with a left-side scope. I'd have a graveyard of frankenStens by the end

Though if you do try the Glock mag idea an anon suggested earlier, imagine how much fun it would be with those 50rd drums...

>>32446195
>semi auto firing from a closed bolt
>Sten

yea, no.

ur a cunt

>>32447855
He only recently started using a trip, but he's trying to develop a semi automatic short recoil gun to be sold for less than $100, basically to arm as many Americans as possible.

File: 1482455601610.png (286KB, 328x427px) Image search: [Google]

286KB, 328x427px

>>32447863
>assuming
>mad

gtfo cranky pants

>>32447894
He's at like 150 bucks at this point.

PCCs are fucking stupid now pistol and carbine ARs are like 450

>>32447855
>cheap AM rifle

dude
hear me out

make it break-action with the largest fucking locking lug you can craft
imagine the glory as you decimate a jeep with a 35lb lump of duct tape, rails and botched welding

>>32447912
Pretty sure he's still sub 100, seeing as I'm helping him.

Also your average nogunz doesn't give a shit about /k/omrades arguing about pistol caliber carbine effectiveness.

>>32447859
1/60th of a degree, otherwise equating to a shot grouping of 1" at 100 yards.
I didnt think this thing could do it considering the barrel is not actually fixed at any point, its just held in by 2 bushings, which it can actually rotate inside of.

I also built it for like, $200, so not bad.

>>32447863
Okay big guy, you build something better then.

God mode, dont just assemble an AR and claim you built it.

>>32447962

I'd buy one if you used lighter metals or something. And I could put a sling on it. I'd be willing to pay $500.

>>32447894
Could be pretty neat, if I run into him ill have to see if he wouldnt like to collaborate.

>>32446195

Very cool man, is that paracord, or what?

>>32446319

"before the pepe liberator anon sells a bunch of pipe bombs to half of /k/ who will procedes to blow themselves up with them."

>9mm
>Exploding
>Implying

Anon, pls. Only men are allowed here. Even if a 9mm blows up, chances are nothing serious will happen.

I've had a Jennings / Bryco / Raven 9mm literally blow up in my hand, blew the fun right out of my hand, with pieces of brass in my hand and cheek. I'm fine.

I would not be saying the same thing if we were talking about rifle rounds, or really anything more powerful than a 9mm or .40, but...relax dude. It's not going to banana.

>>32446399
>I want to build a reliable and accurate 9mm carbine that manahes not to cost a bunch but also isnt complete hipoint tier

Me too friendo. I hope you finish yours as well.

>>32446510

I could not believe how inexpensive they were when I looked. They are shitty though from what I've heard from friends who use them. Feed issues.

>>32447326

It is bad. But it was for him, so...fuck off lol

>>32447811

Who are you? Is this T? It sounds like you.

>>32447855

I am a tripfag, but only because some joker decided to take my name and shitpost with it. If you guys had ID's around here it might be different; but it is what it is.

>>32447787
If you leave it featureless (without 'evil' features) like in this photo, I bet this will sell in CA or other liberal backwaters.

I want one of those to trigger as many libs as I know.

>>32447953
>deliberately scamming nogunz out of money on your tin toy when better advice would be to get an actual gun
I'm not going to stop you or even critique this business choice. Just think it's a shitty thing to do.

>>32447962
Just a pet peeve of mine when people act as if 1MOA is some massive unobtainable acheivement when most can get it if you aren't a dip and know how to adjust sights. Figure of merit should be standard but that's neither here nor there. Overall that's pretty good on your part, how far along are you on the closed bolt kits? Fucking no fun ATF.

>>32447863

Yea nah, know what he meant, unfuck your jimmies mate.

>>32448026
I had like 10 out of battery firings today with my 9mm AR and only 2 case heads burst. So yes 9mm ain't gonna espload it more than likely

>>32447894

Yes Sir. This is you, I knew your word selection! It's weird how that works, I've had it happen with IRL friends.

>>32447912

Get your facts straight man. I even said for people to screencap what I said.

I'm going to add 100$ to whatever my cost is without factoring in labor; and that is the end of it.

If that is price gouging, you have been to one too many Bar-mitzvahs.

>>32447953

It's gotta be (you)

>>32448013
Im looking into experimenting with maybe using an aluminum tube instead of steel, but honestly like 3 pounds of its 7 pound weight is the bolt.

Since its direct blowback it has to be a certain weight. Too light and the recoil spring has to be so heavy you can barely cock it, plus then it just starts cycling so fast that it catches the brass before it can even eject, and tends to chip the extractor.

No point making it heavier, too light and it turns into a difficult to cock extractor chewing stovepipe factory.

I could use a lighter bolt if I used delayed blowback, but then you are adding manufacturing complexity and its not cheap anymore.

Point is, this thing is going to go through a lot more testing and development.

>>32448034

It would be a shitty thing do if it didn't work....but it will work. And /k/ will love it. I'm unironically doing this for all of us.

>>32448050

Why is that?

>>32448034
Its normally NOT this huge achievement, you are correct.

Its just busting the myth that cheap semi-auto tube guns have to be spray and pray bullet hoses or dangerous unreliable zip-gun style affairs.

>>32448078

"but honestly like 3 pounds of its 7 pound weight is the bolt."

Hey man, I'm kind of deciding on buffer spring rates at the moment, would you mind sharing what you are using?

I know your bolt weight is different, but I have in my mind what I want, and I'm interested to see if it's similar.

File: 20161226_185849.jpg (3MB, 4032x3024px) Image search: [Google]

3MB, 4032x3024px

>>32448026
Yeah, I didnt want to add weight or manufacturing time so I just paracorded it.

Honestly the open frame style grip wasnt too bad but fuck it, 15 minutes and 30 feet of cordage and its way comfier and looks kinda cool vs 3 or 4 hours trying to jigger up some kind of actual grip out of something.

>>32448091
It was either:

The ammo, all reloads I had made. It's possible those cases recieved an excessive charge but my quality control hasn't been that bad for like 10 years, it was all loaded with hi-tek coated 147 grain lead bullets at about 1000fps so is possible the bullets played some part.

Or

Because I was shot suppressed and i had already put about 400rds through it without cleaning or lube it was exceptionally dirty.

Or

My head space is excessive which is unlikely as no other cases have shown abnormalities.

Or some combination of all of the above.

>>32448164

No it looks good, really. I'm not good with braiding / wrapping so that is probably cooler to me than it is to you lol

>>32448191

Ah. But yeah, I'm pretty confident that we won't run into any issues, for the reasons you just mentioned.

File: 20161226_190334.jpg (3MB, 4032x3024px) Image search: [Google]

3MB, 4032x3024px

>>32448115
Really simple striker system, the same sear and tripping lever the original sten used holds the striker back on the bottom guide rod whole the top spring sends the bolt along the top guide rod.

Whole affair rac rotate via the charging handle into a hook saftey.

>>32448235
Forgot to mention, firing pin is an AR-15 pin and retained in the bolt pretty much the same way as on an AR. Striker smacks into the back of it when you pull the trigger and the sear drops.

The bolt cycling to the rear upon blowback resets the trigger by hitting the tripping lever.

>>32446229
That is incredible. Well done

>>32446510
I like colt mags but can't help but think reliability would be improved if they were curved slightly like mp5 magazines.

I have 4 metalform colt type 32rd mags, what is supposed to be the gold standard for colt style mags and I'm using the gold standard for mag well adapter a Hahn precision dedicated adapter. I cannot get 100% reliability out of the with my rifle unless I load them to 25 rounds. I will say neither is passed any hypothetical 300 round break in if such a thing exists for these mags.

I'm gonna try come c products and some 20rd ones, I have a few 10rd c products mags and they have been excellent. Obv YMMV but that's been my experience thus far.

>>32448063
Nah, it's aerospacefag doing some evening browsing. Gonna work on the CAD stuff tomorrow seeing as the holidays are for the most part done and I'll be left to my own devices.

Also we should set up a discord or some shit, nigga

>>32446308
In my opinion, you should consider having the magazines mounted sideways on this gun if you intend to put a bipod on it.

Also, something I think some people would appreciate would be if you made a model which would be able to attach an AR15 pistol grip, because the hollow metal Sten grips are REALLY not very pleasant.

>>32446451
MP40 mags and Sten mags are pretty much the same, they both have the same problems, feeding will absolutely shit itself if the lips aren't at a perfect 8 degree angle and they are very sensitive to any kind of damage.

OP's idea to make it use Uzi or Colt SMG magazines is an incredibly practical one and lets it preserve it's aesthetics while actually being more reliable.

>>32447787
you got some sauce for that book my man?

>>32446229
3 moa

>>32448078
I'm wondering if you could do a really simple lever-delayed design? That might be a relatively easy way to lighten the bolt.

>>32449157
Lever-delayed should be reasonably easy, look at how the FAMAS does it.

Consider doing some minor fluting in the chamber if extraction becomes problematic, and consider maybe putting a small neoprene pad in the rear of the receiver for the bolt to impact against at the rear of it's travel.

>>32449138
This.

I'm not a gunsmith but have fair machining experience.

I would take time to precisely measure all the RELATIONSHIPS between parts because the test weapon works so well.

The idea has great potential.

>>32449157
>>32449184
>not gas delayed

Do you even Volk?

>>32446510
That's why they originally had the mag well to the side dude. What were you thinking would happen

>>32449234
Harder to do.

>>32449267
I didnt intend to put the magwell on it, or be shooting from the prone.

After im done with it im giving it to my dad. He's got 3 ruptured disks and 2 of his neck vertebrea have been fused.

He intends to use it to shoot from a bench, and doesnt wanna be hunched over resting on his elbows and spend the next 2 days after an outing with a sore neck and back, so he asked if a bipod could be put on it so he can just sit behind it on a stool when firing.

I just made it vertically fed cuz I thought it would be neat to do.

>>32449429
*didnt intend Intend to put the bipod on it

>>32449341
How so?

I mean, the gas tube would have to survive high pressure, but so would the barrel and chamber.

With the FAMAS being a clusterfuck, I don't know that lever delayed is actually that easy an action to implement.

>>32449631
I dont forsee such an action being feasible.

All it would do is remove a bit of weight at the expense of being more difficult to machine.

Keep in mind im using a lathe from the 1940's in my garage, im not in a machine shop with a CNC mill and stuff like that.

As it stands im currently turning the bolts out of old tractor crank-shafts and using a very, very nice milling machine that an actual gunsmith who is my buddy is gracious enough to allow me access to after hours.

>>32449689
I was thinking gas delayed blowback purely because you only have to add one extra part compared to a sten.

The hard part isn't the machining, it's figuring out how much gas pressure you need to have the gun cycle but not blow up.

I guess you'd have to do an okay job to have those calculations match with what you actually built.

File: 90d3e76a1a9424b6d282f033cf621cf6.jpg (72KB, 704x428px) Image search: [Google]

72KB, 704x428px

>>32449689
Look into the Riesing action, not quite lever delay but a recoil delayed action with a fixed barrel that could mostly be turned out on a lathe and simple mill provided you work out some kinks

>>32449729
Now you need to lock the action in some way so it doesn't just blow open due to the lighter bolt. That increases the complexity and the machining. Without a locking mechanism you'd just have blow back with an extraneous gas tube that doesn't end up doing anything.

>>32450268
For an smg a simple tilting block would probably work, main problem is the timing would be bashing your head against a wall.

>>32450319
Which at that point you wouldn't need a gas system. Timing would be a pain indeed but not insurmountable.

>>32450075
Again, these are all neat ideas, but I dont see them providing any benifit over whats there already.

Its a 7 pound gun, yeah, its not some light little 3 pound takedown gun, but it wasnt ever meant to be anyways.

I think having direct blowback is the easiest way to make it, which equates to cheap.

Most I see myself doing is maybe making it hammer fired instead of using a striker because strikers aint the most reliable or safest way to do things (if you drop it while cocked the striker has a chance of disengaging from the sear and firing vs a hammer which is much less likley to do so)

Also means I could add a traditional saftey as right now the only saftey is trigger control and a hook saftey.

Direct blowback is effective, and easy to make without advanced equipment which translates into easy maintenance, fewer parts, and ultimatley lower cost.

>>32450436
Oh, thought you were looking into alternative ideas to direct blowback.

Regarding strikers, they are as safe as the machinist makes it, a poorly made hammer mechanism with bad materials will be just as dangerous and not drop safe.

If you plan on selling complete guns I think there is a series of drop tests you need to pass.

>>32450482
Naw, somebody was complaining that the whopping 7 pound weight would break thier atrophied scoliosis riddled spine or some shit.

I explained that aside from trying to use aluminum as the reciever material there really isnt a lot of weight saving measures available.

Bushings are key to structural integrity, barrel is as bare bones as it gets, stock is best described as skeletal at best, and since its direct blowback the bolt weight is determined by caliber, and cannot be made anything but heavier, as its already as light as you can make it with this action and still reliably function.

A benifit of the 7 pound weight is pretty much zero recoil, and the long barrel makes is suprisingly quiet.

You can fire it without ear-pro without discomfort. Or atleast I can, I lost some hearing in a few explosions.

>>32450646
At that rate it doesn't really matter, to make it shorter you could make a telescoping bolt but that would be more machine time...

>>32450646
Have you thought about going a step further with the design and making it into a magazine-in-grip set-up like an UZI or a Mac-10? Also, have you ever looking into fabricating a Mac-10? I've always wondered if a Mac or a STEN is easier to fab.

>>32450757
Yeah. Im not trying to re-invent the mp5, im trying to ressurect the sten-style 9mm.

I think it can be modernized, accuratized, but still be kept cheap. Im trying to build a bare bones semi auto rifle that is cheap as hell, tough as nails, and performs well.

It seems increasingly nowdays you are stuck choosing between a $600-1,200 gun, or some cheap bullshit like the hipoint.

I want to create a gun in the $400 range so folks dont gotta choose between expensive or crap.

>>32450769
They are a similar level of skill to produce, but el-cheapo mac and uzi knockoffs are a dime a dozen, and dont really seem to be too popular in carbine configurations.

I think im going to stick to the sten style, or at the very least the ambiquitous "tube-gun layout.

Things seem to be working out as is, so I dont see any reason to scrap 6 months of work. I guess once I iron out the bugs and start trying to sell it the demand or lack there-of will decide if its something I can actually sell.

>>32450814
AR pistol kits are like 450-500, not to be a dick but unless you can get costs consistently below that I wouldn't waste time.

Also it would seem .45 and 10mm are similar in terms of bolt weight needed so I'd simply skip to 10mm.

People love that meme caliber for some reason.

>>32450914
You cant buy 10mm for $200 for 1,000 rounds.

As for AR pistols, well thats fine, they aint rifles unless you pay a $200 tax stamp to slap a stock on em.

Hi point carbines seem to be selling like hotcakes in the $400 range, and they are cheap plastic crap with only 10 round single stack mags, 15 if you dont mind some retarded bullshit that looks like crap.

I think a decent cheap 9mm carbine has a good market.

If nobody buys it well then I just ended up spending a bunch of time playing with guns in my garage and didnt really lose anything.

>>32450992
Must be just my local market then, same there's a Ruger PC9 for 450 and it was sitting there for the better part of five years before the owner gave it away to a family friend, the same day I figured I could have resold it for 600. Never really heard of anyone buying a pistol carbine but you are right there is a market if you can make it sexy enough.

Was more talking about another option if the 9mm does well 10mm has a big market because people who like it love it to obsession.

>>32451043
See, thing I thought was if it gets off the ground and im making enough to reinvest I could make alternate models with more bells n whistles.

Maybe an every-man model thats just plain jane, a take down model, and maybe offer alternate calibers.

To start it will be 9mm plain-jane though. What ive discovered happens when you make a gun and start working on it everyone gets excited, then tries to make it theirs and add thier own little ideas to it.

Its why "designed by a comittee" is such a joke in the firearms world. Everyone tries to make it into something just for them and the end user gets this crazy over-complex mess in a rare caliber and with features they dont need.

Its best to start simple and leave room to add things as the market develops.

If I build one and piles of customers start asking for 10mm, then I will make it.

When developing a product if you scramble to try to please every special request you end up not making any money. Mass appeal is key.

>>32451168
Take down model should be simple enough. People need to learn how to just take a base model and make it thier own, AR aftermarket made people lazy I think.

I'd definitely be making a wood stock and grip for the base model when you get to production but I know how impractical it is to get set up for that these days so I won't say that would be a good idea.

Unless you can find a supplier to outsource unfinished stocks and then- there I go again.

>>32451220
You could just buy an old surplus wooden MK5 stock and pistol grip for like $40, should fit the same, I didnt change how that stuff mounts, its got like, 95% parts commonality with the original stens.

File: warnant j mod francotte cal 450-01.jpg (36KB, 592x344px) Image search: [Google]

36KB, 592x344px

>>32451265
Huh, didn't know that.

Like the skeleton pistol grip though, the angles reminds me of old style revolvers so checkered wooden grip slabs would be nice.

>>32451363
I coulda done that, just as mentioned earlier, it was a lot easier to just paracord that shit since its a prototype.

>>32450268
You don't need locking for delayed blowback, that's the entire point.

>>32449631
The FAMAS is a clusterfuck for a host of reasons, lever-delayed blowback isn't strictly the main one.
It's more an action that is suited for pistol calibers than rifle calibers (in my head anyway).

>>32448235

Ah, I see you have gone for the "high inertial resistance, weak spring," kind of a setup. Looks very cool. In mine, the buffer is the bolt as well too.

I'm glad to see these types of things being looked into, I'm right there with you; It's just like with Boats or Diesel trucks; people are used to paying so much fucking money for something that they just...don't care. They don't notice. "Just the way it is."

Fuck that shit.


>>32448340

Same kind of thing on my end, it's just easiest to use a blowback reset sear and striker. If thought goes into it, it's surely fine. People like to piss on strikers. I liked your safety, I was thinking of doing something like that as well.

>>32448974

Oh what's up man? Yeah you are good, I figured you were enjoying your Christmas time, no issue m8

"Also we should set up a discord or some shit, nigga"

Yeah you're right; I'll get it done today and email you and T the link. That will make it easier if anyone else joins in, it's just one step instead of an email chain.

File: 1450751042010.jpg (429KB, 1750x2500px) Image search: [Google]

429KB, 1750x2500px

>>32446229

impressive but, not even close to 1 moa

>>32450992

I'd buy your gun in 10millimemer for $400-500

>>32449138
>>32453442
For a 32 round group? Yes, it is at least 1 1/2 moa

>>32446286
Which way are we talking about? Right? left?

>>32453442
Its 32 rounds kneeling at 100 meters, with most of them keyholing a 1 inch hole.

Obviously unsupported firing im going to have outliers, but the rifle itself is shooting that well.

>>32452335
Then we are saying the same thing. The other anon was talking about using a gas system. Without locking you can't have a gas system since the recoil forces will act to open the action be it delayed your straight blow back.

>>32453800
>most of them keyholing a 1 inch hole.
>rifle itself is shooting that well.

keyholing isn't a desirable trait

>>32453895
>keyholing
I'm not sure you know what that looks like.

>>32453906

Teach me then, Mr. Expert

File: IMG_0648.jpg (1MB, 3264x2448px) Image search: [Google]

1MB, 3264x2448px

>>32448235
Nice, did you make that bolt from an old one, buy a pre-made bolt, or machine one from scratch yourself?
I'm inspired to get back to work on mine, but first I need lathe training
Pic related, my 'custom' tube cobbled together with features from a few other designs

File: sPzG5Ol.jpg (39KB, 507x337px)

39KB, 507x337px

>>32446308

if you haven't already, try tuning the feed lips on your mags

File: gcysBpZ.jpg (43KB, 540x388px)

43KB, 540x388px

>>32454005

>>32453996
Turned the bolt from an old tractor driveshaft.

Broke sooooo many bits and heads. Heres what ya gotta do, they make this lathe wax, you can melt it and cast it into any shape, when it cools its real hard like plastic, and you can lathe and mill it into an approximation of whatever you are making, or just practice different cuts and material removal.

When you are done you gather up the shavings, melt it all down, and use it again.

Save you a ton of time and money while you are learning, as opposed to practicing on real stock and breaking tool heads when you fuck up.

>>32454005
We did, problem with ww2 mags is they come with widley varying degrees of wear, manufacturing quality, and material quality.

Plus it aint like it used to be where ww2 surplus is a dime a dozen and widley available. Now days folks want 30 to 50 bucks for a mag that may or may not be quality because regardless of quality they are fast becoming relics and collectors items valuable for the era they were made in more than thier practical modern applications.

File: Image12.jpg (87KB, 800x1082px)

87KB, 800x1082px

>>32453906
Bullet flies sideway and hits sideways.
It suggests either the rifling isn't stabilizing the bullet properly (for an extreme example, if you were to chop off a 20" .223 barrel in the middle, you'd notice some pretty awful keyholing when it shoots), it could also be that the crowning on the muzzle is bad.

>>32454010
>>32454005
That shit is really not worth the effort these days, Uzi mags and Colt mags are infinitely better.

>>32453895
Tell ya what, you go rebuilt a ww2 sub machinegun whose original accuracy and quality requirements were "atleast 50% of the rounds hit a an area the size of a doorway at 100 meters" which was then used heavily, cut into pieces, and allowed to rust for 70 years.

When you get it built and shooting groups like that at 100 yards you can use it to show me what your idea of accuracy is.

I didnt say I built something that does what nothing else can, I said its incredible that this specific build is able to accomplish getting 80% of its shots into a 1 inch group at 100 yards.

Typical sten gun variant builds arent focusing on anything other than being capable of firing safley. Most folks consider the project finished if it will just feed and eject reliably while firing and call it quits, its exciting because this project demonstrates that even a cheap as shit tube gun build can be easily tweaked to give exceptional performance and reliability with basic tools and entry level machine shop skills.

Im not stroking my dick saying im better than everyone because I shot this group, im saying that anyone who wants to can build a gun that does this.

The point im trying to make is that tube guns dont gotta be dangerous unreliable spray and pray set ups, and you dont gotta be a skilled machinist or gunsmith to make em perform at this level either.

The point im trying to make is that ya dont gotta pay 600-1,000 to see groups like that out of a 9mm carbine.

>>32454211
You know what I meant mr technical. 80% of the rounds I fired went through the same 1 inch hole on the target.

No, by bullets are very clearly not turning sideways.

>>32454165
Cool, how hard was the feed ramp to do?
It's the part I'm most hesitant about machining myself, but I know using the original bolt wouldn't be a walk in the park

>>32454271
You said "keyholing", it's a very specific term, then someone called you on it and you said they don't know what it means.

>>32454165
>Broke sooooo many bits and heads

"Speed cuts, feed breaks". If you are going to machine parts, consider buying small pieces of metal from your local machine shop or online. There are plenty of suitable, and pleasant to machine, steels. A machinistbro can give you plenty of useful advice.

Cheap coolant misters off Ebay cost about 15 bucks, and water-based coolant makes life much easier.

File: 20161227_122011.jpg (3MB, 4032x3024px)

3MB, 4032x3024px

>>32454284
It dont really have a feed ramp honestly, its got kind of a concave bevel around the barrel, as long as the gap bewteen the chamber and the magwell falls between 1/32nd to 1/16th of an inch it will feed cuz there aint enough room for the nose of the bullet to go anywhere else.

But: ww2 9mm parabellum was shaped a bit differently than some of the rounds they use today. They had sloped sided projectiles that were seated a weee bit deeper.

It will fire modern longer rounded projectiles fine enough but loading the ww2 era mags is a LOT easier with ammo that matches ww2 seating deths and projectile shape.

My 2nd protype will have a feed ramp and use modern mags and be designed for modern ammo shape and seating depth varietey, i inadvertently made this gun prefer ww2 era ammo because I took my headspace and chanmbering measurements off of the original design.

Pic related, a more traditional 9mm parabellum loaded to ww2 british standards compared to a couple modern day cartridges.

Its no problem for me cuz im a reloader, but yeah, like I said, version 2 will update and correct that oversight.

Farthest left was loaded to ww2 british standards, the rest are all modern loads, note varietey of seating depths and projectile shape, the ww2 era guns were designed for 1 standard ammo type.

>>32447651
where's the extractor? the ejector? how does the feed ramp function? how does the bolt release systems work?

>>32454504
>extractor
>ejector
Strictly, you can get by without them.

>bolt release
You pull the trigger and the bolt goes forward, picks up a round, then fires.

File: 20161227_122800.jpg (3MB, 4032x3024px) Image search: [Google]

3MB, 4032x3024px

>>32454504
Ill dump a few pics of such and explain.

Here is the "feed ramp"

Chamber and rear bushing bevel inward. You can also see part of the extractor, close up of it follows.

File: 300px-Sterling_SMG.jpg (5KB, 300x129px) Image search: [Google]

5KB, 300x129px

Why not make your next prototype similar in design to pic related? It would allow you to create a longer barrel but with the same overall profile. You could still keep the bottom fed magazine design if you move it to just in front of the trigger guard.

File: 20161227_123217.jpg (3MB, 4032x3024px)

3MB, 4032x3024px

>>32454551
Extractor is pretty simple,

Grooves on the bottom of the bolt fit feed lips to the left and right, center groove is for a fixed extractor pall.

As the bolt travles rearward the pall grabs the base of the spent case, and and strips it from the extractor, which is hinged by a pin and under tension from a spring seated underneath, the casing tilts towards the side that the extractor is on and is thrown from the ejection port.

File: 20161227_123950.jpg (3MB, 4032x3024px) Image search: [Google]

3MB, 4032x3024px

>>32454599
Inside the reciever.

Foreground is the sear that retains the striker, and the tripping lever that resets the trigger upon being activated by rearward movement of the bolt.

Background just in front of the chamber is the fixed extractor pall, which is actually a solid piece of the magwell.

Bolt travels rearward and the pall strips the round from the bolt as it does so, the extractor imparts direction on it out of the ejection port.

>>32454559
I thought about that, but the bolts on those sterlings as well as the trigger groups are different enough that i wouldnt be creating a 2nd prototype as much as creating a completely new one.

Im going to focus more on advancing my current design for now, mainly due to limited funds and time.

>>32454413
My wax cutting and turning method is cheaper and has even lower risk of breaking stuff.

Plus, instead of having to buy a new piece of stock for every practice session I can just melt it and cast it into whatever profile I want it, cylender, rectangleular billet, hell, I could cast it into an octagonal prism if I felt like some oddball project ai was going to work on required such a shape.

At the end of the practice session you just melt it back down and havent lost anything. Its called "wax" but its more like hard plastic, and it give indicators on where you would have broken a head or fucked up by chipping and flaking.

Great training aid, my gunsmith buddy put me on to it.

Great thread, Breeki bro. I was pretty gobsmacked when I saw that grouping from a self-made smg.

I wish we could do our own gats here (aside from max two barrel blackpowder muzzleloaders.), I'd love to design and make all these silly designs floating round my head, like top/side magazine fed shotty with Mad Max feel to it.

Also, nice tip on that machining wax.

>>32447863
Agree. Lame.

File: ATF_Agent_Flemming.png (80KB, 273x341px) Image search: [Google]

80KB, 273x341px

>>32447863

Yes, let's all discuss the manufacture of fully automatic firearms.

Show of hands how many people here have violated federal law?

File: 1482204871678m.jpg (72KB, 745x1024px) Image search: [Google]

72KB, 745x1024px

>>32456891
That is a water distiller, Mr fed and there isn't anything you can do to disprove that

>>32446195
>>32446229
>>32446308

It's really more of a STEN RIFLE than a STEN gun don't you think? Otherwise I think that thing's awesome. What'd you use for scope mounts? And I thinkl the colt 9mm mags are going to be you best bet, they're cheap and everywhere. Or uzi mags for the same reason.

>>32457137
Given how nearly identical Colt and Uzi 9mm magazines are, do you think it's plausible to make a gun which can accept and feed from both reliably?

File: IMG-20161224-WA0055.jpg (804KB, 4032x2268px) Image search: [Google]

804KB, 4032x2268px

>>32456891
Yeah, I kinda like having these fellas around.

I get that /k/ tries to emulate this eccentric dale gribble persona a lot, but seriously, does a person really come on here expecting to find a thread detailing somebodies journey to felony construction and posession of a machinegun? Then get all butt hurt cuz it turns out they obeyed the law?

They can get thier own house raided.

File: Rusty Shackleford IED.jpg (53KB, 610x414px) Image search: [Google]

53KB, 610x414px

>>32457554

>does a person really come on here expecting to find a thread detailing somebodies journey to felony construction and posession of a machinegun?

>>32457554
You'd be surprised how many people have absolutely no understanding of firearms law, particularly NFA laws and constructive intent.

>>32457554
I mean, the ATF did treat goading a drunk guy into chopping some shotguns and then besieging his farm and family like a triumph of justice as a result so who knows how petty they are.

You sure as heck wouldn't be bothering with a closed bolt if you were planning things nefarious and illicit. Nice doggo.

>>32457619
Funny thing is, it aint even my dog.

It just shows up and lets itself into my house, stays for a few days, acts exactly like its my dog and weve known eachother for years, then wanders off for up to a week at a time.

No friggin idea whose it is, my only neighbors live a mile away and Im over for dinner enough to know it aint thiers.

Well trained, he sits, stays, heels, rolls over, fetches.

Great dog, im only worried about claiming it, its rural montana, if I try to actually keep him his owner might show up with all his kin and shotguns all pissed off saying I stole his dog.

>>32457137
And easier to load. Im not kidding, the springs on sten mags are so stiff you cant get much more than 10 rounds in one without a loader.

>>32457661
Might have been some shithead yuppie dumping his pet out in the country. Always have to see at least one dead and starved housecat on the side of the road driving up to my parents house out in the country.

>>32457661
Have you tried seeing if he responds to any names?

File: 651623c473c91defb87f2df22a10f977_zps68e1b480.jpg (45KB, 736x736px) Image search: [Google]

45KB, 736x736px

>>32454635
Huh, that'll be pretty easy to make a take down model later on production like you mentioned, making an indexing trunnion and latch like the bannerman would be slick. Unless you plan on making it a two part like a take down ruger.

>>32456919
Except take you to court and bleed you dry to make an example of you while wasting your tax dollars. You can survive the rap but not the ride in regards to government.

>>32446308
Can you make or post a detailed guide to making one of these? I'm really interested in making one for myself. In semi auto of course.

>>32446195

Slightly unrelated, but how does the paracord help with getting a good position for your cheek? I've considered buying some for my side-folder.

File: Elian Gonzalez.jpg (44KB, 660x371px)

44KB, 660x371px

>>32457619

File: 20161227_212139.jpg (4MB, 4032x3024px) Image search: [Google]

4MB, 4032x3024px

>>32457992
Considering that all ya gotta do to remove the stock is push a button and slide it off, I think its already half a takedown rifle, aside from its 7 pound weight that is.

If I altered the barrel bushings so that maybe it can thread on or some other method then you could pop the barrel off and have an 18 inch, 2 inch deep 5 inch wide package.

Maybe sell it with a molle pouch that holds all the components when broken down.

Could attach it to your pack like a sustainment pouch maybe.

If you wanted to use it as such maybe you could keep it light by using a small light holographic reflex sight.

I dont think 7 pounds is too much, obviously its no chiappa little badger, but then again, Im also an ex grunt who doesnt think a pack is heavy until it hits 100 lbs or more.

Need to see what people think of it, I think the take down niche could just be a bonus feature, that crowd seems pretty persnickety about mere ounces, i think 7 pounds keeps it from being a true take down, but it still makes it way more stowable.

Not sure what to call it. Enhanced stowing capability maybe?

>>32458062
Honesly, I dont use a cheek weld, its not really critical until you start shooting at longer ranges, this is a 9mm, granted its got a 16.5 inch barrel boosting velocity, but its definitely a 150 yard gun.

I just put it on the grip cuz its better than the original skeletal grip, and I did the stock cuz I had 20 feet of chordage left so why not.

File: 9x19 single stack carbine mag wip 2.png (142KB, 407x879px) Image search: [Google]

142KB, 407x879px

>>32454599
>>32454635

I'm working on a single-feed 9x19 magazine designed for 3D printing. It's single-stack, currently, but I'd like to make a double-stack single-feed one after I get that one working smoothly. I could probably adapt it for use in your carbine if you'd like.

>>32447651
>moaon aabe

>>32459611
>single piece body
So its too big or warps on cheap printers. Why not something modular?

>>32459611
>3d printing magazines
I mean, I guess but a mag kit would probably be the better option for delivery behind enemy lines. I don't really keep track of the latest and greatest but that would be rather flimsy regardless of what you print it on.

>>32459230
Maybe call it the camp or frontier model in reference to the old camp 9s?

>>32459611
Mmmm, maybe. But I really dont trust 3d printing as a manufacturing method yet. Its a wonderful prototyping platform, but there would need to be a lot of improvement to the tech before mass production of quality products is feasible for it.
>>32459937
Thats not a bad idea, could be copyrighting issues though.

Right now im calling it the "motherfuckin 9" cuz correcting feed issues was a mother fucker, still is. It will go 5, 6, 7 mags no sweat.

Right when you start backslapping and getting excited, click. FUCK.

Jams 4 or 5 times in a row, then resumes functioning flawlessy. Fucking makes me vent my spleen.

Im hoping using new mags on the next build will fix it.

>>32459979
Have you tried shooting with mags you know are good and polished to see if it was a mag problem or a gun problem?

Is it just failure to feed?

File: sddefault.jpg (22KB, 640x480px) Image search: [Google]

22KB, 640x480px

>>32459230
In your next build you could try to attach weight under the barrel hidden by the forearm like the Ruger police carbines to get the balance a little better and a little tiny bit ot increased friction to help with reducing bolt velocity that would help with feeding.

Kind of like a telescoping bolt but easier to manufacture.

>>32460478
It actually doesnt have ballance issues, and heres why, the bushings inside the front of the reciever already are performing the function of adding weight up front.

Theyre basically 1/2 inch thick steel rings.

As for slowing the bolt down I think the next is going to replace the guide rods, striker, and springs with a hammer fired system kinda like a direct blowback version of what an AR has and 1 large recoil spring. I think it may allow me to hollow the bolt out a bit and could shed some weight, I think engaging the hammer and having a bit bigger spring will slow it down too.

Also will actually make it less complex as its replacing the sear, guide rods, and springs with just 1 spring and an AR or AK syle hammer.

>>32460420
Ive tried all that shit man. You just gotta handle these things to understand it.

Literally every sten mag is utter shit. Even the 2 "good" mags I finally got arent good, just slightly less shitty.

Sten mags were and are shit. Its not really a secret, they knew the mags were faulty when they made em, they were just too deep into ww2 already without an SMG and needed it fast and in mass quantity and just accepted that guys were gonna die because of jams and failure to feed caused by terrible magazines.

The stens reputation as a piece of shit is slightly misplaced, the gun itself was fine, it just had some of the worst mags since the chauechat.

>>32460862
Kind of like the mechtech but with a forward magazine?

I'm not really jive to the exact mechanics of blowbacks other than the basics but I thought increased Spring strength only helped with felt recoil and general wear.

>>32460951
Well it goes like this:
Direct blowback is actually a gas operated system.

The bolt has to be a certain weight, and the pring has to be a certain tension so that when a round is fired the bolt stays closed until the gases reach peak pressure in the barrel.

Too soon or too late and you are losing velocity, and the casing might rupture as it is being extracted too early.

Im really not increasing spring strength all that much, im just replacing two shorter smaller ones with 1 single slightly longer and slightly larger one with similar strength.

So im essentially just lengthening and thus slowing down the cycle of operation a wee bit. It might help with the feed issues a bit.

>>32459898

It's still being worked on. It'll be multiple parts printed flat. The split hasn't been done yet.

>>32459937

The walls are at least .200" all around. It's overbuilt to all hell.

>>32449631
Wrong. Lever delayed blowback isn't one of them. Lever delayed is used well in machine guns, and in Submachine guns without issue. It was also featured in a prototype Soviet rifle for hthe AKM. It offers a sealed system, and helps manage recoil a bit. Only reason why it was rejected because the Soviets had Fudd officers who prefer the familliar kalashnikov action.

>>32457368
Uzi mags are interchangeable with the colt system if you cut holes for the magcatch in the side of them,you just don't get last round hold open with Uzi mags. This is pretty common with 9mm ars

>>32462645

More importantly, it allows a ridiculous ROF and you can fully free float the barrel.

>>32453812
Actually, you don't need locking for all gas systems, gas delayed blowback is literally unlocked.

File: image.jpg (69KB, 1081x512px) Image search: [Google]

69KB, 1081x512px

>>32446195
Let's say you manage to successfully make a business out of this or you finished this project. Do you have any other plans to make other DIY rifles? I'm personally looking forward to attempt a Sterling 7.62 in the future with some attempts to modernize it, such as free floating the barrel, Give it an ease of attachments, and adjustable sights. While the original used FAL L1A1 inch Pattern magazines, I was thinking it would accept G3 magazine since they're very cheap from all the surplus around. I'm also looking to make one in 5.56 and make it STAGNAG compatible.

>>32462918
I mentioned earlier in the thread that Im buying an old browning M2 .50 spare barrel from somebody for $250 bucks and im going to build a $250 anti matierial rifle with it.

>>32462918
So how will you make it work? Those old things were lever-delayed or something, right?

Also how much do you think the final product will cost? It'll be hard to undercut PTR at $800 for a nice battle rifle.

>>32463168
That Royalnonesuch kid on YouTube already made a cheap .50BMG, it's a screw-plug gun that holds one shot, and somehow he's selling it through Serbu (apparently they weren't satisfied with selling a good semi-automatic .50BMG rifle).

I don't think you could plausibly make a .50BMG rifle much cheaper than $500
I have seen someone make a single-shot bolt-action rifle from an M2HB barrel though, he posted his progress on here and everything, used an old G3 lower for grip and FCG. Someone ought to have a picture.

>>32463272
Things get much much cheaper when you use recycled materials and do all the work yourself. I can make the bolt out of a cranckshaft, im gonna do something simple like pic related.

It wont be a barrett, it wont be a 1,000 yard accurate gun, but it will fire .50 and will only cost $250 bucks because the only part im buying will be the barrel.

Royal nonesuch is a fucking retard. He spent like 3 years building the same slam fire gun in various calibers until people quit watching so he started buying and building (poorly) kits, now his hipster fanboys worship him like hes the next moses browning. I think if I start my own DIY gun channel I can blow him outta the water.

Plus shit talking and calling him out could generate views and subscriptions.

Idk, it pisses me off how utterly terrible his ceaftsmanship is and how breathlessy rapt his audience is over them.

I built better guns when I was 12.

>>32463448
>I think if I start my own DIY gun channel I can blow him outta the water.
Do it, kid needs to be taken down a peg.

Mostly because I don't want to see him ruin Serbu Firearms.

>>32463448
Pic related, a serpentine matchlock hande gonne patterned off of a medieval illustration that I built out of a hydraulic pistol when I was 12.

Granted my dad bored it for me, but seriously. It pisses me off that a lot of these gun channels just churn out utter shit on a shingle and they somehow get 500k+ subscribers like what they are doing is so amazing.

You always see 2 kinds of people making DIY gun videos.

The guy with a $40,000 CNC mill making it seem like you need hundreds of thousands of dollars worth of gear and training to make a nice gun, and the witless idiots who perpetuate the myth by turning out shoddy unsafe and butt ugly zip gun contraptions.


I aim to demystify gun making for people and show that hey, with a set of hand files, a $300 hobby mill, and a dremmel you can make very good looking safe, functional, and accurate firearms at home for very cheap.

>>32463502

Serbu was already a giant tool. He's only latching onto RNS because his own channel was struggling to maintain any viewership.

File: 20161228_103910.jpg (3MB, 4032x3024px)

3MB, 4032x3024px

>>32463515
Sorry, forgot pic, serpentine matchlock built by 12 year old me.

>>32463524
I don't care about his persona, I just like the guns he makes and sells.

File: lighter lock musket.jpg (967KB, 2592x1456px) Image search: [Google]

967KB, 2592x1456px

>>32463533
I'll one-up you in simplicity.

>>32454211
>cutting a 20" barrel to 10" will make it keyhole
Opinion discarded retard

>>32463839
>long barrel with a presumably long twist
>cutting it in half is fine

>>32463916
>.223
>long twist

>Not understanding bullets stabilize quickly and the main reason for long barrels is for velocity

Off yourself noguns

>>32463533
Illegal sbs life the best life

>>32464000
You realize that muzzle loaded weapons are not classified as firearms under federal law right?

Barrel lengths and bore sizes dont apply to them unless your local state law says they do.

>>32463839
>twist rate is suddenly not proper
>crowning is completely gone
Pretty sure it'd keyhole, fäm.

>>32463638

IDK. At this point I put him barely above Alex Robinson.

>>32464449
Even with the crowning gone that doesn't mean it will keyhole. Also you can recrown a barrel with a pocket knife. The original post I responded to implied that barrel length had anything to do with bullet stabilization and it pretty much doesn't*.
Also
What the fuck are you talking about for twist rate. It has nothing to do with barrel length** it's mostly about bullet weight.
*you need enough length to have the rifling mean anything. This is done within the first few inches.
**the only time the barrel length has anything to do with twist rate is with progressive rifling which is almost nonexistent for gun typically except for some competition guns.

Holy fuck why are there so many retards on /k/

>>32464860
>Also you can recrown a barrel with a pocket knife

Oh dear god. No. Just no.

>>32464860
>you can recrown a barrel with a pocket
Am I being rused here?

>>32464940
Not him but I would more call that deburring in the event it's a hacksaw job.

Regardless it's 1 MOA from 25 yards, not 350

OP should shoot at some books or bits of wood to prove it's going in straight to get these idiots to stop talking. It won't be the most accurate but the stability offered by it at 16 inches would be more than enough for most PCCs

>>32464940
>>32464945
I was referencing an article where a guy did that because he was demoing barrel length vs accuracy and was hacksawing the barrel. It got shit accuracy then he used a razor for a shitty recrowning but it worked well. I'll find the article give me a minute or so.

>>32464953
>>32464964

The absolute cheapest method I'd ever suggest would be this:

https://www.youtube.com/watch?v=b43odFm0mrI

>>32464940
>>32464945

I can't seem to find the article I'm looking for.......it's out there and I'll keep looking but here's a nice read about barrel length vs accuracy
https://www.google.com/amp/s/www.thetruthaboutguns.com/2013/10/daniel-zimmerman/the-truth-about-barrel-length-muzzle-velocity-and-accuracy/amp/?client=ms-android-verizon

>>32465096
Isn't it more about a barrel being properly manufactured from the ground up to be for a certain length that allows it to still be accurate, compared to hacksawing an existing barrel?

>>32465547
It's not about the length it's about having the appropriate rifling twist for the weight of bullet your using.
So if the barrel is a good barrel for your round it doesn't matter if it's 20", 8" or an 8 that was cut from 20.

File: Bike wheel.png (1MB, 595x1274px) Image search: [Google]

1MB, 595x1274px

This is an interesting thread.

>>32465096
I wasn't able to find it. The gist was that a guy hacksawed a rifle and it got shit group then took a razor and used it to crown the barrel and it worked pretty well.

>>32446195
Just so everyone knows, OP made his from an Indianapolis Ordnance kit. I dont believe there was any crank shafts involed at all.
>>32446229
Plus you are supposed to stake the barrel in place so it doesnt spin.
>>32446794
Also the "take down" model is just going to be a Sten mk.2 since the barrel already screws on.

Not that none of this isn't neat, just dont try to say its something it isnt.

>>32467708
Naw, the old bolt i tried was an indiannapolis bolt but I couldnt get it to work so I copied it with a mill.

Also the springs indiannapolis sends are utter crap. Good quality, but waaaaay too heavy.

>>32467835
What issues did you have that caused you to scrap that bolt?

>>32468138
The first problem I had was that it was galling the shit out of my guide rods, I guess I coulda tried polishing and rounding off sharp edges, but I was also having a lot more feed issues than I am now
(probably due to sharp edges, burrs, etc etc)

I think I will eventually just polish it up a bit and use it in another build, but I kinda thought I could make one a bit better, and that it might correct feed issues.

Turns out the main cause of feed issues were from the mags, but yeah, indiannapolis stuff aint bad, but atleast im my experience, the bolts are not very finely finished.

Did I mention the original springs were super heavy? Like, I could barely cock the weapon using the springs they sent, and I had them set up to the exact measurements that indiannapolis specified.

Idk, ive only bought one bolt from them, but if anyone is thinking they are drop-in quality, heh, no.

I'd think of them more like a 99% completed bolt, like, shafts for the guide rods are still rough, its got sharp edges where it oughtta have been bevled or rounded, and it required deburring.

Also the guide rods required peening, and the ends still needed to be rounded off, also had to cut one of the guide rods to the actual proper length as the striker spring rod is supposed to be an inch shorter than the recoil spring rod.

Guide rods were stainless steel which SUCKS (stainless steel gets rougher as it wears making it a terrible guide rod material)

Like I said, it would have been easier to touch up the existing one but I was butthurt and wanted to prove I could do it better.

>>32468456
This stuff is all really interesting to read about.
Ever thought of making a shotgun some day? They don't have to handle all that much pressure.

>>32468650
the bolt has to be like 12 pounds last I remember

>>32468853
I didn't really mean making a blowback shotgun, just a shotgun of any type.

>>32468650
I thought about making a black pipe break action shotgun for shits and gigs, but I kinda got a lot on my plate already, so its a bit down the road.