The Panzer Arms AR12 Pro S (Short Forend) Tactical Semi-Automatic Shotgun is a feature rich tactical shotgun that will keep you shooting for hours. The extended heavy-duty muzzle brake gives you optimal recoil mitigation while increasing your accuracy on follow up shots. Panzer Arms AR12 Pro-S is the latest evolution of the AR-12 shotgun, a cutting-edge semi-automatic, gas-operated firearm that combines the aesthetics and functionality.