by Frylock » Sun Jan 11, 2015 7:43 pm
I'm not saying anything new here but definitely clean the recoil spring and tube thoroughly, then oil very lightly (I wipe all parts with a dry rag after lubricating but before reassembly). The same advice goes for lubricating the exterior surfaces of the bolt and rails upon which it rides in the receiver. I'd suspect the recoil spring might be out of spec if you were having feeding issues and failure to go into battery - sounds like an extractor or ejector issue.