No gun is jam proof but my favorite pocket gun is my Kahr PM 9 in a DeSantis pocket holster. They recommend a 100 round break in for them to be reliable and I ran 400 through it without any malfunctions before I started carrying it. If I were in the market for a new pocket gun I would also have to check out the Glock 43. I love my Glock 26 but it is a little bulky for pocket carry for me personally.