Stevens 320 Security Thumbhole, Pump Action Shotgun, 12 Gauge, 3 Chamber, 18.5 Barrel, Cylinder Bore, Matte Finish, Blued, Bead Sight, Synthetic Thumbhole Stock, 5 Rounds 23246 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. The 320 Security Thumbhole model combines and 18.5" barrel with a matte black forend and thumbhole stock with texturing. Like all 320 shotguns, it features a smooth, reliable pump action, proven rotary bolt, and dual slide bars. This model includes a front bead sight for personal preference.