[WildcatClan]

12 gauge is a standard military round.

Yes, I think mostly used by the Marine Corps. They use the Wingmaster, the Winchester 1200 (which I never liked) and the Mossberg 500 and 590 I think.

[El Gato]

They use the Wingmaster, the Winchester 1200 (which I never liked) and the Mossberg 500 and 590 I think.

Army uses some of those as well. Plus they have thing they call the "master key", it's a 12 gauge pump, mounted in the manner of the M209 40mm grenade launcher. Very short barrel. Used more for breaching (taking out the lock or hinges), than room clearing, but will work in both roles, with different ammunition types.