The AR-10s are the beasts that can fire a thousand rounds of ammunition per minute and are able to tear apart a human being into pieces within seconds.
One of the greatest aspects of the AR-15 is the ability to accessorize or upgrade the rifle. A lot of these upgrades can be done with a little gun-smithing.
While the best survival gun is an endlessly debated topic, I think it’s safe to assume that most preppers have an AR-15 or another semi-automatic rifle.