The GG&G Magazine Extension is easy to install. It attaches quickly and easily without modification to the shotgun. This two shot Magazine Extension uses the factory follower. NotesPackage includes a new extended length magazine spring to insure proper function. FeaturesPerfect for Military, Law Enforcement, or Home Defense.Adds two additional rounds and protrudes 2 1/4" beyond the end of and 18 1/2" barrel.The end cap of the magazine extension tube can be removed separately to facilitate cleaning and the use of a magazine plug.The magazine extension tube nut is CNC machined from wear resistant solid steel bar stock versus aluminum.The unique magazine tube extension nut is manganese phosphated in a non- reflective combat finish per Mil-Spec.