Ammo, BCG, LPK, or…?
I have stock BM 16" carbine with a brand new BCM BCG. I test fired with 130 rounds of PMC 55gr .223 and got a single light primer strike resulting in a failure to fire. It was in the last magazine of the session, approximately half-way down, so at/about round 115.
Assuming that this is an issue, what should I be focusing on to diagnose and correct it?

