Stevens 19496 320 Security 12 Gauge 18.50" 5+1 3" Matte Black Matte Black Fixed Pistol Grip Stock Ambidextrous Hand (Full Size) 1-Piece Rail Includes Cylinder Choke. The Stevens 320 shotguns are well-built imported models carefully selected for their performance and value while providing many features only found on more expensive models. The 320 Security Pump features a proven rotary bolt design and dual slide bars for reliable operation. The receiver is a bottom load with right eject. This 12-gauge model has a black synthetic stock with a pistol grip, 18.5" blued barrel with a cylinder bore and sight rail, bead front sight, and heat shield.