I can't be certain & give out a name of a gun! Cause when that happens, I wouldn't know it so I'd be shocked & town will panic, so no time for shopping guns. But let's think we got accidentally into a gun storage. I'll pick anything with a silencer or anything that silencer fits it well. Cause I don't want to distract everyone of those toward myself with the sound of shooting.If there is no silencer I'll pick anything available. But again let's think everything is available.This is one of my favorites to pick. (Also I'll pick any tool who's able to dig a skull).