just bought a 10.5, have tried 3 types of ammo, double feeds every second round. tried new ejector, double feeds. orderd a new BCG from NEA hope it fixes the problem. the worst ammo that double feeds every time is PMC FMJ xtac. the rounds seem to jam up into the feed ramps. im a newbie at the AR thing, could it be bad feed ramps? i hope that wasnt too dumb of a question?
mine is doing the same thing, it sat at EPPS for 3 weeks, North Sylva was saying it was extractor springs so i picked it up and changed the springs and its still doing the same thing, ####ing garbage! Im going to ask for an exchange because Im not waiting another ####ing month for somebody to look at it and confirm what Im saying. Im hoping they will do an outright exchange for a 14.5" upper, My other 14.5 works fine.



















































