Remington 870 with slug and field barrels...
Can hunt anything with it to feed the Family, more than enough even with light buckshot load to ensure any unwelcome person(s) were evicted from your home, and if push come to shove my 10yr old could use it unlike trying to strap him to an AR or AK.
Not to mention unless you've used it as a club and broke the stock off or bent the barrel they are about as bulletproof as they come... I something did break they are one of the most widely used guns at least in the US.