I posted earlier about an extractor problem. KT sent me a new extractor, I installed it with no problems and went to the range today. It worked great. I went through 4 magazines without a hiccup. Then another problem began. There were a few "soft strikes" where there was a slight indention on the primer but it did not fire. This happened several times. Then the firing pin gets stuck and will not return. I inspected it and the spring. The spring appears to be good. The pin does not appear to be bent or have any abnormal appearance. When it is installed I can push it in and the pin returns to the normal position, but when it is fired it gets stuck and is extremely hard to push back out to the ready position. I am going to call KT tomorrow to see what possbly could be the problem but thought I would see if anyone here has had that problem. I installed the pin several times to make sure it was inserted properly so that the buttonhead screw was seating inside the grove of the FP properly. So that is not an issue. It seems that the tip of the pin that is struck by the hammer is wedging inside the opening of the slide causing it to become wedged. I do not know that for sure but it looks like that's what it could be. Anyway, has anyone else had any similiar problems? See Update Info on post 6