I occasionally pocket carry a Kahr CM9, which is reasonably comfortable, unobtrusive and reliable once it has a couple hundred rounds through it. I mostly shoot 9mm Glocks, so the CM9 was an easy choice -- at least until I find a single-stack 9mm Glock, like a slimmed-down 26. But as sfeile notes above, pocket carry can be hard to master. A good pocket holster is a must. And given the size of these guns, they can be a little snappy, especially with +p or +p+ ammunition.