04-11-2014, 07:46 AM
You could have to much gas. Did the directions specify to open a half more turn after acheiving bolt lock back? From what I have read on this site, I haven't got mine together yet, to much gas can mimic not enough because the BCG is moving faster than the Mag can respond. The dented case maouths is fairly common and can usuallty be fixed with some cushion on the brass deflector. The soft(loop) side of adhesive velcro tape seems to be the preferred choice.

