Stevens 320 Turkey Thumbhole, Pump Action Shotgun, 20 Gauge, 3 Chamber, 22 Vent Rib Barrel, X-Full Choke, Matte Finish, Black, Adjustable Fiber Optic Sights, Synthetic Thumbhole Stock, 5 Rounds 23251 A new approach to home defense comes standard with an ergonomic thumbhole stock for improved handling and a sturdy grip. This shotgun is built specifically for any task. Like all 320 shotguns, it features a smooth, reliable pump action, proven rotary bolt, and dual slide bars.