The AR 12 shotgun is semi-auto, gas-operated shotgun that looks and functions like an AR15 rifle. AR12 Shotguns are designed to be a multi-purpose that will fill the need of tactical, home defense, hunting, and sporting customers. The shotgun is chambered for 3 -inch and has a 20-in barrel with a manual safety. Designed for tactical use with its AR platform, steel barrel this shotgun is made with performance and durability in mind.