AERO ULTRALIGHT 30MM SCOPE MOUNT SPR BLK Our Ultralight 30mm SPR Scope Mount features a rear ring that is pushed forward 2", resulting in better eye relief. This scope mount is designed to fit AR type upper receivers with Mil-Spec 1913 Picatinny rails and features a cross-slot keyway that offers excellent recoil protection. Our Ultralight Scope Mounts free you from unnecessary bulk, providing one of the lightest mounts in the industry. Finish Anodized Black Material 6061 T6 extruded aluminum construction Scope Ring Size 30mm Scope Mount Profile SPR Weight(s) 3.36oz Other Features Designed for AR type upper receivers Ring/Base Torque: 15 in/lbs. Non-permanent thread locker recommended.