The MC312 inertia driven, semi-auto shotgun that eats 3″, 3.5″, and 2.75″ but with added 24″ turkey-rib, mid-bead, fast-swinging barrel, a true Picatinny rail cut into the receiver, common mag tube threads, common choke tube threads, combination camo + cerakote finish, fiber optic front sight, and field-tested optics that come up like they are supposed to.