ok i bought a slidefire stock the other day. expensive but alot of fun. ripping through a whole mag is easy. doin short bursts is a bit trickier. the problem im having is after a burst or so i keep havin a malfunction with the trigger.its weird it will have a live round in the chamber but i pull the trigger and nothin. if i pull the charging handle back enuff to look and make sure i got a round chambered yet not eject that round, the trigger gets " reset". and im back is buisness but not sure how to fix this malfunction. only seems to happen when i try to do shorter bursts. ive tried the stock on 2 different lowers thinkin maybe something to do with the trigger. but still happens. also tried 2 uppers and still happens?? maybe the bolt carrier??any clues?? or any 1 else have this problem???