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 Magpul FDE Cerakote - 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 - Screw Torque 15 in-lbs