This used Penn Arms Striker 12 "SE" fires the 12 gauge shell. It has a 2" barrel with a 3" "Royal" Muzzlebreak. This semi-auto, very cool shotgun holds 12 rds and has a vertical grip. It has very fast firing action that allows you to fire 12 rounds in approx. 5 seconds. It comes with lockable carrying case, sling, and manual. This is a Class III AOW & all NFA rules apply.