Originally Posted by
MTechnik
Failure to Feed? Failure to Fire? It is the 3rd round out of the magazine ONLY? Or every 3rd round?
Have you tried different Magazines?
Have you tried giving it a thorough cleaning?
Have you tried different ammo?
Have you checked the chamber and bore and made sure everything is smooth?
Have you checked the feed ramps are lined up correctly?
Is the a USGI magazine? Did you slap it into your hand to seat the bullets back? (oh wait, says pmags - ignore that one. or get USGI mags and try them)
If it only happens on the 3rd bullet have you tried just loading 25 rounds into a magazine and shot it?
It is new, did you tear it down and lube it all around?