The AD-RECON-S Mount by American Defense Manufacturing was designed for putting high powered optics on flattop AR10s, lever action rifles and bolt action rifles, especially those in a chassis system with a full length handguard covering the barrel. The AD-RECON-S is compatible with riflescopes with an objective lens up to 56mm, and utilizes ADMs patented QD Auto Lock Lever systems to accommodate rail systems that are both in and out of spec. The AD-RECON-S can easily be adjusted with your finger or a flathead screw driver, and features a superior clamping surface for max rail engagement. Other features of this mount include a solid construction of 6061 T6 aluminum with a T3 mil-spec anodized hard coat, and can be configured to lock to the front or rear. Features of the AD-RECON-S Mount: Made for attaching high powered optics to flattop AR10s, bolt action and lever action rifles ADMs patented QD Auto lock system Compatible with in and out of spec rails Can be adjusted with your finger or flathead screw driver ADM AD-RECON-S 35mm 20 MOA Standard Lever FDE Scope Mount AD-RECON-S-20MOA-35-FDE-STD