S-12 Semi-Automatic AK Pattern Shotgun 12 Gauge - 19 Threaded Barrel Chrome-Lined 3 Chamber - OAL 38 - Right Side Charging Handle - Manual Bolt Hold Open Button - 4 Pos. Adjustable Gas System - AK Enhanced Safety - Hammer Forged Bolt Carrier and Trunnion - V Notch Rear Sight Bead Front M1913 Rail on Dust Cover - Bulgarian Pattern Side Optic Rail - Utilizes Saiga Pattern Magazines - Accepts AK Pattern Grips and Stocks - M22 x 0.75 RH Threaded Barrel - Inlcludes 1: 5rd. Magazine and Owners Manual