Glock 23 with 40 to 9 conversion barrel and extra G19 mags. If you look at all the members here that picked Glock and expand that on a national scale, in a full zombie attack replacement parts (if ever necessary) should be on every dead body you find. I like being able to shoot 9 or 40 depending what I find. Think about all the G17, G22, G23 and G19 mags full of ammo I'll find on the dead and they all work. You can never carry all the ammo you'll ever need. If you have an old nail you have a Glock armores tool and now you are a gunsmith.