I had one of the P22 "competition" sets that came with a 5in barrel and compensator. It was very picky on ammo. Never used it for anything more than plinking but it was a jam o magic as well. I sent it back to Walther to have it checked. They sent it back with a new slide at no charge. They never specified the problem and has functioned fine although it's still picky on ammo.Walther p22. Biggest jamming piece of crap. Extracter also broke and hit me below my eye.