Mobilchoke screw-in choke tubes are made of high-grade steel with nickel-plated finish for corrosion resistance and durability. They are fully interchangeable between all Beretta Semi-Automatic and Over-and-Under shotguns.
The locking wedge design ensures that the taper on the base of the choke tube locks into the taper of the barrel to provide a positive gas seal and a safe lock-up of choke to barrel. Fitting flush with the end of the barrel, Mobilchoke tubes are steel-proofed to withstand the rigors of non-toxic steel shot. The conical parallel design, with the choke tapering and running parallel out to the muzzle end, improves pattern uniformity and density.
Their long length creates a more gradual taper inside the choke tube, resulting in reduced shot deformation and better patterns because of improved uniformity and increased pattern density. Typical Beretta Choke Constriction: Cylinder - Inside Diameter .000-.005.