[Polycarp]

a concealed 9mm will generally do the trick.

Yes, there is concealed carry in PA. But never bring anything to a gun fight that doesn't start with at least a ".4"

I prefer my 1911 style compact .45. With laser grips. Ain't she sweet?

[Antoninus]

I prefer my 1911 style compact .45. With laser grips. Ain't she sweet?

I've fired one like that (without the laser site, of course). Big noise, big kick. Nice!

[ninenot]

Au Contraire, Good Doctor.

If you bring a small weapon to a gunfight, take Jeff Cooper's advice and SHOOT FIRST!!!

Generally, even a .22LR from a half-decent handgun will make a large impression on your opponent--disorientation follows, and the fight is over.

I'll stick with my mucho quick H&K 9mm, 147g's of JHP.