"I carry an NAA Pug .22Mag on dog walks in my quiet little Texas town, but I wouldn't carry it for any other occasion ... .22Mag can certainly kill you...)
I was wondering if anyone was going to bring up NAA. I got a NAA widow maker with the folding grip/clip a couple years ago. I LOVE that little gun. Perfect for things like dog walks or trips around town where you don't intend to end up in a situation where you'd need a gun, but if you do you've got it in your pocket/on your belt, and it's no bigger than a cell phone. Shockingly accurate too for a little barrel like that.
The Zombies won't care if your gun has 10 more pounds of muzzle energy than mine.