I just got a new AR upper in 7.62x39 and am somewhat stumped about an issue. I expected some problems but nothing on this level. I finally got it to fire with an enhanced firing pin then found the gun to be locked up after every shot. It seems as though there is absolutely no gas to the BCG. I even plugged the chamber with an empty case and blew down the barrel with compressed air. Zero air escaped the gas tube. I’m thinking a severely misaligned gas block or they just completely forgot to drill a port in the barrel which would be hard to believe. Any thoughts?