My PF9 was returned multiple times in the past, but finally did run right after a frame replacement. Recently it started to have several failures to eject, and multiple light primer strikes (at least one per mag). I hadn't been on here for a long time, but logged back on and following multiple threads on here I diagnosed that the spring either needed to be bent in a bit, and that the firing pin might be dirty or have a burr on it. I put a soldering iron on the screw for a few minutes, but even then the screw stripped out. It was like the screw was way over torqued, or the head of the screw was not hardened (maybe both). In any case, I called customer service and was told that the only solution was to buy a screw on the website... Tim did not even want to discuss the history, etc. I hate to complain over a buck, but one thing is for sure.... KelTec Customer service is not what it use to be!!!