Mine had a bunch of key surfaces that were left too rough (like say, the breech face) And it would start jamming after only 20-30 shots. I polished all the stuff that needed it, and strengthened the recoil spring. It now runs fine. But I also need to do the trigger. It's a good pistol, but may need work to get it to run well. Other members here have them, and say they run fine. YMMV
