Beretta optimachoke 12ga.Full flush FEATURES:-Full Choke-Longer & slimmer than conventional Mobilchoke tubes-Thanks to the elongated cone they minimize pellet deformation & improve shot patterns-The various versions are fully interchangeable on 12 gauge guns w/ Optima Bore barrels-Fits Beretta 682, Some 687 models, Silver Hawk, DT10, Some 391 models