Choosing an AR barrel for a lightweight build

Elkins45 · Jan 16, 2017

The goal is to build a lightweight gun on one of the intgrated-stock GWACS CavArms lowers. My two choices (both stainless) are a 1:7 pencil profile or a 1:8 twist A2 profile. I only shoot 55 grain bullets, so the 1:7 twist really isn't needed. My question is whether you would you expect any noticeable gain in accuracy with 55 grain bullets in the A2 1:8, or would you just save a few ounces and go with the pencil barrel?

ZGunner · Jan 16, 2017

I would save the weight. I don't think you'll gain anything with the A2 profile and I don't think you'll lose anything with the 1:7 twist.

NWcityguy2 · Jan 16, 2017

Either barrel could shoot the bullet in question better. Plenty of 1:7 twist barrels shoot light weight bullets very well.

Mosin Bubba · Jan 17, 2017

I'd go with the pencil barrel. Not only does it save you some ounces, it saves it from the end of the gun where you would feel it more. Think of it as a weight on the end of a lever.

M1key · Jan 17, 2017

I don't care for the pencil stainless based on something I read about them here:
http://www.m4carbine.net/showthread.php?141291-Stainless-Steel-Barrels-410-vs-416-vs-416R

This is the one I have and would recommend:
http://palmettostatearmory.com/psa-...ride-slim-pencil-profile-barrel-assembly.html

good luck

M

Ibmikey · Jan 18, 2017

Faxon "Gunner " profile are some fine shooting light weight barrels, 1/8 and QPQ nitride treated. Of the dozen or more Faxon barrels i have my favorite AR sports one of the Gunner barrels. I have put hundreds of rounds through it in a very short time and although the barrel was smoking the targets were still falling as fast as i could get sights on them. The Gunner takes a .625 gas block.

REB · Jan 18, 2017

I will second the Faxon Gunner profile barrels. I have been very pleased with mine.

Jackal · Jan 18, 2017

Faxon pencil or Gunner is what you want.

MachIVshooter · Jan 19, 2017

5.56mm can't drive bullets fast enough for 1:7 to be problematic. I have rifles with 1:7, 1:8 and 1:9, they all shoot everything from 40-69 gr. just fine.

Decide based on other criteria.

Browning · Jan 19, 2017

Another vote for the Faxon pencil or gunner barrel.

Choosing an AR barrel for a lightweight build

Elkins45

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ZGunner

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NWcityguy2

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Mosin Bubba

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M1key

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Ibmikey

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REB

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Jackal

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MachIVshooter

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Browning

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