I posted this in the GAP10 forum as well but, still haven't had any responses. Anybody seen this happen to a BCG? Rifle belongs to a friend of mine who is having a hell of a time with this issue. This is borescope video through the tail end of a gap10 bcg it's one of the ones built on the seekins receivers. Almost looks like a bushing is in there where the firing pin should rest. When the "bushing" for lack of a better term is slid back the firing pin retaining pin will not fit behind the firing pin and the rifle will not function. I've never seen this happen but I don't own any seekins or GAP10's. Do any of yours do this?