I had a very hard jam yesterday morning. The gun was running fine, then just locked up. I brought it home, and to dissamble it, I had to tap the bolt with a wooden dowel. Once I had it apart I found a little sliver of steel. It took about 10 minutes to find out where it came from. It was a small piece that had broken off the right rear of the guide ridge on the bolt. I checked the breech lock screw and found it to be very loose. I had used loctite instead of peening. Anyway I guess it could have been worse. Just wanted to let people know, so something similar won't happen to you.