Which gun would you take?

If you had to take only 1 gun in an emergency situation which one would you take and why?
I dont have any 22's so mine would be an ar15 because I can carry lots of rounds, feed myself on it for a long time and still drop most game with a good clean shot at under 500yds.

I've always said that if I was limited to one gun in a survival situation it would be a 22 rimfire because of the number of rounds I could carry on my person. Have to get close to larger game but I could conceivably carry several thousand rounds on me.

A 22/ shotgun over under. But realistically i can always take a rifle and handgun so high caliber handgun (44/454/460 ish) and lighter weight ar