28 gauge Rizzini chokes. Two bore profiles — Plus and standard Rizzini — both in flush-fit tubes that finish level with the muzzle. Plus-bore guns include a Light Modified, a half step between Improved Cylinder and Modified that sporting shooters tend to leave in the barrel all day; standard-bore guns include an Extra Full.
Nominal bore is .550″ (14.0 mm). The profile is stamped on the tube and listed on your gun’s spec card.
