NAA mini revolver.
Totally serious, not even joking. I had a S&W Model 17. Neat gun, but I quickly realized that I just don't really care much for shooting .22s overall. So to me the only appeal of the cartridge is that you can cram it into some tiny guns. I like tiny guns.
Although really, I'd go for a .22 Short model because if you're gonna have a tiny gun, might as well have the
tiniest of guns.