I am having the same issue (kinda) I have an aero lower using there tune, buffer, and spring. A 14.5 ballistic advantage barrel (carbine gas) seekins adjustable gas block. I think mine may be over cycling? Bolt will not lock back on empty mag. If I hold the bolt catch in the catch position the bolt will catch every time. It ejects every round but doesnt pick up the next one. I have tried different magazines. The bolt is also leaving dents in the back of my lower. Any ideas? I am also running a saker brake. I am sure that adds more back pressure.
