FEATURES-12 Gauge-Extended choke-Constriction: Mid Range-Diameter: .718-Fits Beretta Optima HP-Triple Shot Technology of three graduated rings in the parallel section of the choke,that allow a more gradual transition from the shotgun bore to the final constriction.-Reduced pellet deformation-Shortened shot string-Less flyers-Ported for reduced muzzle jump & recoil