16" 7.62x39 Black Rifle Arms Mid-Length 4150 Nitrided Barrel

A: It's Blacknitride QPQ

A: We would recommend try what setup you have now. If you any issues then we would recommend standard carbine spring with an H2 buffer.

A: Dimpling would break the corrosion layer of the barrel, yes the gas port is drilled after nitride but it being covered by the gas block and high pressure of air it doesn't have high risk of corrosion like dimpling as most gas blocks do not cover them causing it to corrode. Gas blocks that utilize set screws use flush cup screws that bite in the steel and when using a thread locking compound like Red Loctite it is not necessary to have a dimpled barrel.

A: Barrels are back in stock, we currently do not have any coupons due to our ongoing limited supply issues.

A: Back in stock now. Once we sell out it maybe the last we allocate to standalone barrels as we are probably going to set the rest aside for our piston uppers.

A: No it's not, their system requires a much larger gas port and I'm not sure if you could get it running even then. You would need to call them for making their system work for this gas length in this caliber.

A: Yes, our barrels are concentric with bore.

A: No. We literally take them out when building demo rifles and just start shooting full auto through them. Never an issue and who has time for all that shoot a few, clean, shoot a few more clean.....we say let it rip!

A: I just put a few in stock. Our shelf was empty so went to the workshop where they do the upper builds to pick up a few and we have more at nitride due back soon.

A: A mid-length gas system will help in reduce recoil over the carbine gas system. If one was doing a build with a picatinny gas block and not a low profile gas block a mid-length gas system would allow for a longer handguard, as well.