I just purchased a used CW 40 and took it to the range yesterday. I was very excited to shoot my first Kahr! However after the first shot I knew something was wrong. After every shot the slide would lock back. I don't think it was a FTF because the original shell ejected properly and the slide didn't come forward enough to even touch the next round. If I pulled back on the slide and let go it would chamber the next round. Anyone know what my problem is? Or if Kahr offers any kind of warranty on a used gun? If so how is their customer service and turn around time?