Maybe you can help trouble shoot.
Iv had numerous failures to fire, and a few failure to chamber. The FTFs cause failures to extract.
When letting the bolt slam (week compared to what Im used to w/ a 5.56 weapon)forward it rairly seats all the way. I usually have to manually push the bolt the remaining distance w/ my finger. Even them I get FTFs followed by FTEs.
It sounds like a hammer thing to me combined w/ the bolt not seating properly. Your thoughts?