Define "If the world should fall apart".

Worst case scenario it'd be pretty hard to agrue with some kind of larger caliber assault weapon if staying alive was the priority.Isn't that what they're for?

Thompson Encore. Good luck.

For Bullkllr>Original question on that page was:What kind of gun should you have incase the world should fall apart because of natural catastrophy,asteroid hit,or some other incident like that.Most of population would be wiped out,and mainly usage of gun would be hunting,but you should be able to handle just about any situation possible with only one weapon.