Beretta’s Optima-Choke HP Ported Black Edition tubes are extended choke tubes made from high-strength steel with a blued finish, available across the full range of constrictions from Cylinder through Extra Full. The slot-ported design vents gas to reduce recoil and muzzle jump, making follow-up shots faster and more accurate. They are fully interchangeable on all Beretta 12-gauge barrels threaded for Optima-Choke HP; Optima HP and standard (non-HP) Optima tubes are not interchangeable.