JTS M12AR-B1 12 Gauge 3in Black Semi Automatic Shotgun - 18.7in -Whether you shoot recreationally or are on a mission to defend your home front, JTS shotguns are built with power, versatility and purpose in mind. Based upon the semi-automatic AR pattern, the MK12AR-B1 shotgun features a 4-position adjustable gas system for use with different loads. It comes equipped with a chrome lined barrel threaded for use with Rem Choke tubes, polymer forend, a fixed AR-style buttstock. Features Shoots 2 3/4in and 3in shells; Picatinny Rail; Chrome lined barrel; 4-Position gas system for adjustments based on loads; Fits Rem Choke tubes; Comes with two 5 round magazines; Barrel Length: 18.7in; Overall Length: 37.99in;