7.62x39 10 inch barrel, help

[Bocephus123]

Buddy of mine got a 10.5 350 legend BCA upper, biggest pos ever. We tried everything to get it to run and oycle target ammo but it wouldn’t. We opened up the gas port to just under 1/8” and it still wouldn’t run so it went away.

I figured it out and applying for a patent has nothing to do with the magazines

 

[ClintC]

After build several AR 15 and AR 10's. it all comes down to how it functions. from what in reading its a failure to extract. Im gust guessing but it does sound like it is under or over gassed. Adjustable gas block is where i would start to slow it down. if it is under gassed it could be the gas port in the barrel. the most comin thing to over look during a build is to inspect all ports.

 

[mouthpiece]

Previous discussion

Making a 7.62x39 AR-15 work reliably

Making An AR-15 in 7.62×39 Work Reliably Posted November 25, 2014 in DIY, Hunting, Shooting by Major Pandemic with No Comments Running the 7.62×39 in the AR-15 platform has gotten somewhat of a bad rap. Read through forums and you would think people are a little bi-polar, with one post saying...

www.okshooters.com