Our Ultralight 30mm Extended Scope Mount features a rear ring that is pushed forward 1", 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.Specifications:Made in AMERICA/th>YesFinishAnodized BlackMaterial6061 T6 extruded aluminum constructionScope Ring Size30mmScope Mount ProfileExtendedWeight3.27ozOtherDesigned for AR type upper receivers, Screw Torque - 15 in-lbs