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Anonymous
BCM upper advice needed 2017-04-18 05:03:25 Post No. 33682327
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BCM upper advice needed 2017-04-18 05:03:25 Post No. 33682327
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Hey /k/
I am looking into getting a BCM upper and I have narrowed it down to two choices:
1. BCM BFH 16" Mid Length (LIGHT WEIGHT) Upper Receiver Group (.625FSB). I would either fit it with a non-free float rail from Midwest or go with a FF rail from Daniel Defense.
2. BCM Standard 20" Government Profile Upper Receiver Group. I am not sure what rail I would want to go with the upper if I went this route.
My question is if you could only have one upper with your lower, which of the two would you go with? I ideally see myself using this for home defense/SHTF. I am slightly leaning towards the lighter 16" upper but I could see the value of reliability in a 20". Any advice appreciated.
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>>33682327
14.5" most reliable with carbine gas length, more wear on parts
16" midlength is slightly less kick, still same reliability but a few ounces heavier in the front
20" and rifle-length gas system puts less wear on moving parts than a 16" or 14.5", and will last longer than the two but it won't be ergonomic to wield during drills or the sort
i own a 16" BCM BFH for my all-purpose carbine, i've humped an M16A2/A4 on a 12k before and that thing becomes a motherfucking rock around that 6 mile mark, so i can't suggest a 20" for shit hitting the fan for that very reason
10 lb. 5.56 weapon = bad idea, no-go for me, 5.56 is too underwhelming, even an M4 with an Acog, foregrip, IR laser and gee-whiz-bang shit is more wieldy than a bone-stock M16A4.
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Get light weight whenever possible. Government profile is useless. For all the shooting civs do pencil barrel is best barrel.
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>>33683063
This.
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>>33683063
>For all the shooting civs do pencil barrel is best barrel.
For all the humping civs do, heavy barrel is best barrel.
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I went 16" on my first build. 18" on my second. I'll probably do a 20" next. I can't really see any benefit in the shorter barrels.
As far as I can tell, 16" is so common only because people want to buy the M4s they see in the movies, but settle on M4geries.
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16" upper, slap a DD Omega rail on there.
Unless you're planning for the end of the world/civilization scenario that requires much much MUCH more than a 4" difference in a single rifle situation, there's no big practical advantage you get for a full size ar15.
In fact, get the 20" if you want, there's a ton of problems you need to address in that same situation, and going rambo and room clearing like some operator, alone, is probably on the bottom of that list.
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>>33682712
OP here
Awesome insight and advice thank you. I think I'm settled on the 16" BCM upper
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Anyone have that chart of 5.56 velocities out of different barrel lengths?
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>>33682327
why don't you build your own upper with the exact shit you want? all you're doing by buying a completed upper is giving some fag $200 extra to wrench your barrel in for you
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