AR15 Assembly Help

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cobra1

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My son gave me a stainless steel barrel, said he's "going a different route" is there anybody here that can put me an upper together? I bring the parts and pay to assemble. AND can you tell me what component determines gas length, I'm thinking barrel? Funny thing is, he gives me this stuff knowin he gonna get it back
 

tRidiot

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If you were around here, I'd help you do it, for free.

Each barrel has a gas port, the distance determines the gas tube length. Here's a basic idea:

media.nl
 

lasher

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i no longer have the tools to build rifle uppers, mainly a vise. vise is a must, torque wrench (which i do have) a must for barrel nut installation. if it were me, i would order the Aero Precision Gen II upper with the hand guard length you want.
 

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