based on the guns that I have. I really like my m1 carbine.
but if it were to be a Zombie SHTF scenario then prob my SPR 5.56 with green tip rds. just because im proficient with it and ammo should be fairly common if one has to rummage thru a decayed society.
otherwise, Katrina or other natural disaster a pistol would be best.

you dont need much if you are a master with what you have.