Machined from lightweight, aircraft-grade aluminum, Rifleman Gen 2 Medium Rings hold a 30mm scope tube close to the bore for a low, stable mounting position. T-15 Torx screws provide secure, repeatable installation, and the rings are guaranteed for life. Aircraft-grade aluminum construction for strength without added weight Medium-height profile keeps the scope low and close to the bore T-15 Torx screws for secure, repeatable installation Guaranteed for life