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80% lowers
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You are currently reading a thread in /k/ - Weapons

Thread replies: 69
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Hey guys, I'm pretty new to ARs, but I've decided to do a build starting with an 80% lower. If I purchased one, could I just take it to my local gunsmith and have him finish the milling and drilling? I heard they passed some legislation on this recently, but I'm pretty fuzzy on the details. Also how much would this cost?

Pic semi-related
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I read something like this, however, it looked like to me you could do it, but they would have to do the normal forums and shit as if it was a firearms purchase, but i may be wrong.
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>>28431007
>If I purchased one, could I just take it to my local gunsmith and have him finish the milling and drilling?
no
any gunsmith you ask will say fuck no unless they are the shady sort
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>>28431221
How do people (excluding machinists) usually finish an 80% lower then?
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>>28431281
With routers and drills.
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>>28431281
By buying a drill press and jig.
Or, if you want to use Harbor Freight, a drill press, trim router, and an 80arms Easy Jig...
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>>28431281
drillpress+ jig, router +jig, freehand dremel
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Thanks for the info guys
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>>28431007
the law says you have to do it yourself, otherwise it becomes a firearm and needs to a permit.
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>>28431329
christ on a stick! what happened to that poor thing?
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>>28431329
absolutely disgusting.
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>>28431394
life happened
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seriously op just buy a completed lower unless you cant for some reason
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>>28431281
I can answer any questions until 3AM est.
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>>28431414
>>28431434
please stop...
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>>28431470
Pic related is this lower with its upper. It works flawlessly and has not had a single malfunction yet.
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>>28431470
you fucked up multiple times and really shouldnt be teaching people unless its a what not to do
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>>28431476
never
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>>28431434
I'm 18, and the fascists at the atf say I need to be 21 to buy one from an ffl because it can be technically made into a handgun. So unless I can buy one in a private sale, I have to wait almost 3 years
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>>28431565
buy a complete gun then
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>>28431510
Yet I explained all my errors, and how to avoid and correct them. You know what they say, you learn from mistakes. Speaking of which, where did you find these pics you are posting? Was it ever test fired?
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>>28431470
I appreciate the offer, but I lack the technical skills to do it myself so it would probably end up like some of the pictures in this thread. I may just try to buy a stripped lower in a private sale
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>>28431597
all of these are saved from /k/ fucks knows if they work or not
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>>28431620
good god that is terrifying
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this one was so close and yet so far probably functional
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>>28431586
I would really like to just assemble one myself so I can learn a bit about the rifle, pick the parts myself and save a little bit of money. Plus it just sounds fun
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>>28431620
They must be from a troll. I refuse to believe this was someones real effort...
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>>28431665
Honestly, I would still consider an 80%, it really isnt that hard these pics are making it seem more difficult than it is
>I am struggling to think of how someone could fuck them up this bad
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>>28431620
Holy fuck, that is some mean Dremel time.
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>>28431665
nothings stopping you from buying one dissembling it and reassembling it
there you go you just did what most ar builders do
if you hate the parts it comes with you could sell the upper and buy what you want
even if you lost 100 bucks selling parts it would cost less than building an 80
its not cheap to build an 80
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>>28431753
I don't see how its expensive... Mine ended up at 500, but that's including some of the tools. To finish it, assuming you sell your endmill, jig, armorers wrench, etc; it would probably end up around 350-400, which is what complete lowers cost. But to be fair to your point, it is much more work, has a risk of being ruined, and will almost certainly be less refined than a professionally finished lower.
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>>28431689
the key factor is most of them said fuck spending money on a jig
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>>28431783
I guess but still. I could freehand with a dremel without failing as bad as some of these guys
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>>28431781
$500 vs http://palmettostatearmory.com/catalog/product/view/id/15072/
this doesnt help op cause hes not 21 but proves my point
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Hello /k/

Calinon here for the first time. Have a question about 80%'s, saw this thread, figured I would ask here. I can just have a 80% shipped to my house right?

This router is fine right? http://www.amazon.com/Black-Decker-RP250-10-Amp-Variable/dp/B000IEFIBO/ref=sr_1_1?ie=UTF8&qid=1451962387&sr=8-1&keywords=router+hardware

It will work with these jig guides right? http://www.80percentarms.com/collections/lower-jigs/products/80-ar-15-easy-jig

If anyone has recommendations/corrections I would love to hear them. Otherwise, tyvm /k/
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I live in a town of about 50,000 so what do you guys think the odds are of finding someone willing to do a private party sale if I post a WTB in my local paper?
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>>28431007

>buy a block of lexane
>mill it with a dremmel to m-16 specs
>insert m-16 parts kit
>????
>profit

bonus points for rigging blue LED lights into that shit with an LED controller in the handle which flashes to the beat of your 5.56. warning, may cause seizures and loss of dog to ATF.
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>>28431848
watch a shitload of youtube videos before doing anything
use lube
measure multiple times before you cut
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>>28431824
Well you can buy that under 21.. but to your point, 180, then depending on area, between 15-150 for ffl transfer. You are also using lesser components. In order to compare to the completed lower I posted, you need one with CTR and MOE+ grip. PSA had one a while back that sold for $210 that fit the bill (although it wasnt a blem so its not really a fair match).

Finally, PSA as we know is an outlier. They are still trying to build a reputation and are selling at minuscule margins. By all means, buy as much as you can from them while its cheap, they make great quality stuff; but I was really referring to MOST complete lower manufacturers.

Spikes tactical
>http://www.spikestactical.com/spider-bullet-lower-w-standard-kit-black-ctr-stock-moe-gr-p-590.html
>$370

BCM
>http://www.bravocompanyusa.com/BCM-Complete-Lower-Receiver-Group-BCMGUNFIGHTER-p/bcm-lrg-stk-mod-0-mail.htm
>$395

Hell even Delton is $195 with a standard M4 stock.


>>28431848
>This router is fine right?
>Black-Decker
No. Go on craigslist, buy a used one for ~the same price and you will have a vastly superior tool.

As for the jig, yes. The router method is the best DIY assuming you dont already own a milling machine.
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>>28431329
Jesus Christ that's gnarly.
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>>28431943
>CTR and MOE+ grip
those arent expensive parts
like you said you could get a delton with standard furniture for 200 then 100 bucks for magpul
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>>28431943
TY basedtrump, I will start dicking around on craigslist.

I plan on watching a lot of videos, I just am trying to get my brain around the actual physical items I need to start.
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>>28431783
I feel like anyone who has passed a shop class and isn't retarded shouldn't be able to mess up that badly. Am I missing something?
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>>28431987
They are more expensive than the off brand grip and MOE stock on the one you linked.

>then 100 bucks for magpul
Exactly. 300 for the lower, not counting shipping +ffl transfer. Before its all said and done it will hit 350, and that's for a blem PSA.

My original statement:
>end up around 350-400
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>>28431992
Yeah spend your time. I took about 2 months to fully understand what the process was before I began putting together a real, no bullshit parts list, and probably only began machining at 3 months.
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>>28431613 just don't do stupid shit, like
>>28431329 did it drunk. It's not hard, jigs make it easy, just RTFM.
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>>28432028
paying slightly more for an inferior product
congrats you didnt have to go through a ffl and have no cereal numbers or quality control
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>>28432150
Congrats you don't know how to green text, and get upset over other people doing things you don't like.
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>>28431329
Let me guess no center drilling, and sharpie tracing paper cutout as layout?
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where would I find a decent cheap jig that would also allow me to cut a low shelf?
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>>28432229
He did it drunk
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>>28431929
Sounds pretty dope

I've heard polymer lowers have issues with cracking on the rear stock mount, maybe thicken those sections up from milspec
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>>28432246
you just fucking measure man
jig only tells you where to drill not how deep
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>>28432005
Access to $10000 machines
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>>28432150
>cereal numbers
kek

>no quality control
You are your own quality control, you're not building fucking ICs here
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>>28432265
jig also holds the receiver in a vise, and I do have a mill with dro, so I'm not concerned about measuring I just don't know how much further to mill out the FCG pocket to accommodate a DIAS for when I finally buy one.

I'm all ears if you have a better way to put a lower in a vise that won't scratch it, and if you have some dimensions for low shelf lowers.
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>>28432273
>You are your own quality control, you're not building fucking ICs here
This. I had a fucking vernier caliper in the first picture of the series I posted, and used it to check wall thickness, and pocket depth.
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>>28432312
low shelf still doesnt help you if you want it pre done except hole 3 you take out way more than any jig will show
at that point it doesnt matter how much additional material you removed as long as you didnt go through the side or bottom
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>>28432392
>you take out way more than any jig will show
figures... So I'm on my own when determining to stop at the depth at the point the DIAS would sit on the shelf.

I've looked around and I can't find any decent looking dimensions to help me either. Not to mention the jig itself to hold the 80 is something I'd have to buy or make from scratch.

god damn, I haven't had this much disappointment when I was trying to do my own semi auto sten bolt design.
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>>28432504
>So I'm on my own when determining to stop at the depth at the point the DIAS would sit on the shelf.
Speaking as someone who completed an 80% with a drill press, that doesn't sound like a difficult thing to do at all.
I thought DIASs used the regular high shelf anyways.
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>>28432813
>I thought DIASs used the regular high shelf anyways.
maybe a lighting link, but a true DIAS needs a low shelf, and you're right. I've been looking around and I think it'd be very simple to make one fit if I got it just right and took my time taking very few passes until I got the correct depth for it to sit flush.

I also found some simple plans for a jig.
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>not compulsively turning every shovel you touch to an Assault weapon of massive destruction.
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>>28432966
>ruining a parts kit for no reason
lets not post boris's shitty build again...
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>>28431470
Will the pocket become corroded or damaged if not refinished? Or is it purely for cosmetic reasons?
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>>28433098
cosmetic, aluminum doesn't rust. it's also resistant against corrosion.
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>>28433098
Cosmetic. You can finish it with alumahyde, cerakote, etc, but totally unnecessary. Aluminum forms a layer of Aluminum Oxide almost immediately and will not continue to corrode further unless you make it (ie, what anodizing is)
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>>28433098
finished mine two years ago and it still looks the same
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>>28432005
Quality of the hardware, prep work.

Get a consumer end drill press, put four holes through in a square, say, 4" between each homes center point. Flip it over. Marvel at how wildly different the exit holes are. Spend the next few hours adjusting the press......
Shop class had lots of quality, if beaten up, hardware. There was also a ton of prep work, most of which students ignore, or forget about the second they leave the shop. Your teacher forced you to do all the necessary prep, so things just went smoothly. On your own, you forget to do some of it, do some wrong, or just don't know what to do/expect.
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>>28432249
Drunk is no excuse. I've seen a drunk Dutchman "slap together" a set of stairs while filling a full size garbage can with his empty beer cans. They were perfectly regular, level and very solid. Not the slightest burr, overcut, or gouging.
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