I got to shoot a USAS-12 once. A friend's father was a cop who invited us all out to the range.

Let's just say 'Woe unto thy unruly mob that marches into one of those."

With #4 Buckshot, emptying the drum would wipeout an entire streetful of Teabaggers from sidewalk to sidewalk and make their paper signs look like those little red star targets you see at the carnival.