The American Defense AD-AEMS mount is a precision quick detach replacement mount designed specifically for the Holosun AEMS Red Dot sight featuring lower 1/3 co-witness height and patented QD Auto Lock Lever technology.American Defense AD-AEMS Quick Detach MountPrecision machined from 6061 T6 aluminum constructionHard coat T3 Mil-Spec anodize finishPatented QD Auto Lock Lever systemTool-free adjustment - finger or flat blade screwdriverConfigurable lever lock (front or rear)Superior clamping surface for maximum rail engagementCompatible with in-spec and out-of-spec rail systemsPerfect for tactical and sporting applications requiring quick optic removal and reattachment while maintaining zero with robust construction built to withstand demanding use.