The Charles Daly AR-12S Shotgun is a gas operated semi-automatic shotgun that features a synthetic pistol grip and stock with adjustable comb. AR-12S shotguns benefit from interchangeable choke tubes using Beretta/Benelli Mobi choke threads letting the shooter have multiple pattern options.Features :"12 Gauge, 3" Chamber"Semi-Automatic"18.9" Barrel with Modified choke,Aluminum ReceiverPolymer StockCarry Handle Rear Sight and Adjustable Front Sight