Proudly made in the USA, American Rifle Company’s M10 Rings represent a new standard against which other rings will be measured. Even under the heaviest recoil, M10 Rings hold firmly without marring or indenting the scope. These uniquely split rings maintain reticle alignment during scope installation while their low profile leaves the shooter with a clear view of the turrets. M10 Rings feature a crowned-rail interface which precisely and correctly engaged rails, even those which fail to meet Mil and STANAG specification. The result is excellent return-to-zero performance. Extremely strong and light-weight, M10 Rings are CNC machined from 7075 aluminum alloy and anodized with a mil-spec hard coat for excellent corrosion resistance and a matte-black finish. Stainless steel hardware is used throughout and includes a high strength 410 stainless cross bolt. The 19mm (3/4") width and single recoil slot engagement offers more eye-relief adjustment than our previous models. Torque spec: 7.3 N-m (65 in-lbs) for all screws