Self Loading Police Tactical 12 Gauge 3 Inch Chamber 18 Inch Barrel Invector Choke System Black Stock 6 Round. Aircraft-grade aluminum alloy receiver. Hard-chromed bore and 3 inch chamber barrel. Standard Invector tube included. Matte black synthetic stock with checkered gripping panels on forearm and grip. Premium recoil pad. Two steel sling swivel studs. Receiver-mounted bolt release button. Curved bolt operating handle. Crossbolt safety button on trigger guard. Extended magazine tube. Aluminum magazine tube cover. Ammunition capacity: 6 with 2-3/4 inch shells.