Well, my P11 Kel Tec is skinnier than MOST single stacks, 1" wide, fits in a pocket, and carries 11 rounds of reliable firepower. I don't see the need in a single stack 9, personally, just me of course. Were I getting one today, though, I'd give the PF9 a thought. It's a little lighter and skinnier than the P11 and only gives up 2 rounds. I like the long DA on the P11, though, very safe to carry, like a little square revolver.