Those two could have walked in with two Mossberg 500 pumps and cleared that room with devastating results. Granted, not as many continuous shots, but it's hard to miss with 1.5 ounces of #4 shot.
Assault Weapon is a civilian term for "scary looking gun". As soon as the Liberal/Progressive/Socialist/Democrats learn the devastation that a 12 gage can do in close quarters, they will be a move to ban them next.