We shot my SU-22C at the Kentucky KTOG Konvention (see the KTOG Goes Local forum for more details), and we finally broke my SU-22C. I have no idea how many thousand rounds of .22 LR ammo have gone through my SU-22C, but it's a LOT. We shot about 1200 rounds at the Konvention. At one point, I managed to lose a round on top of the bolt and it apparently dropped in behind the bolt and the hammer beat it up some (see below). I dumped it out, and I managed to shoot it a little more, but the firing pin was broken. The back of the firing pin was protruding from the back of the bolt, but the front part of the broken firing pin would hang out the bolt face (see below), catch the first round stripped off the magazine and not allow it to be inserted more than half way up the bolt face. The steeper angle of the ammo would tend to misfeed and would need to be gingerly worked in by hand. Oddly, after the first round off the magazine, it seemed to function just fine with a two piece firing pin! I didn't shoot it much after that, because the firing pin hanging out the front of the bolt face could potentially cause a slam fire, including firing out of battery! I'd never shoot a center fire weapon in this condition because it'd be much more likely to slam fire and firing out of battery would be much more dangerous. A replacement firing pin and a spare firing pin are on order! Kel-Tec customer service is the best! I have five Kel-Tec weapons, I've shot the crap out of them, I don't particularly baby them, and this is the first time any part has broken and needed to be replaced. I've ordered spare parts a couple of times before, and I was unable to convince Kel-Tec to charge for spare parts that were not warranty replacements. I'll see if they charge my credit card this time. I doubt it'll be much if they do. Sorry for posting this twice, but I wanted a copy in the thread that's serving as the chronological record of my SU-22 (from the first manufacturing batch), but I also wanted a thread devoted to this so future searches could find it more easily. We should probably discuss the broken firing pin in this thread.