A knife. No joke. I'm one of those people. If I had to take a gun though, then I would probably say a Needler. That or a Spiker. Those things tear people apart. But I would still prefer a knife.
Taurus PT 24/7 pro 9mm. 15 round clips x6, has never jammed on me, light weight, perfect sights. I can shoot a tin can 25yrds away at dusk with the sun to my front