Sig Sauer Alpha MSR 34mm MSR Scope Mount Black - 1 piece - Sig Sauer's proprietary steel alloy ALPHA MSR Scope Mounts are machined with an exactness that is both strong yet ductile that allows our rings to form around a riflescope, yet will not damage scope under proper installation. The steel rings are epoxy powder coated to prevent oxidation and resist gun oils, cleaning solutions, and outdoor exposure. Features: Steel 1913 style clamps Covered by SIG SAUER's Infinite Guarantee Torq specifications for Alpha MSR Scope Mounts: To Rail (1/2in Nut): 65in/lbs To Scope (T15-TORX): 25in/lbs