I bought a really lightly used Kimber Ultra Carry II in 9mm. It is a really nice gun and shoots well. The problem is that is jams a ton. I have tried many different kinds of 9mm factory ammo and I am convinced that it is not an ammo problem. Out of 5 rounds it probably jams 1 or 2 time (FTE & FTF). Also on the last shot the slide does not stay back. It traditionally should stay open correct? Any idea what would be going on? The gun is clean and not dirty inside a bit. Also does anyone know where I can buy a new or used 8 round mag for it? Thanks! - Bob