The Weaver Premium Modern Sporting Rifle (MSR) Optics Mount is designed specifically for MSR rifles and made in America.A specialized modern sporting rifle deserves high-quality accessories. The WeaverA(R) Premium Modern Sporting Rifle (MSR) Optics Mount is designed specifically for MSR rifles. The Premium MSR Optics mount lives up to its name, starting with its construction. It's made of lightweight and supremely strong 7075-T6 aircraft-grade aluminum. The anodized Type III hardcoat black matte finish adds further protection and blends in seamlessly with the rifle. The sleek design sets optics at the ideal height, with a forward cantilever for MSR rifles. The edges are slightly radiused to prevent snagging. The WeaverA(R) Premium MSR Optics Mount adds an extra layer of durability and performance, but hardly any weight.1.5" from bottom of base to ring centerline; .912" from bottom of ring to bottom of baseMade in AmericaDouble recoil lugs lock mount into placePremium 7075-T6 aircraft-grade aluminum constructionMount features Torx-head screws3600 lbs of clamping force, more than any other lever-mounting arrangementWeighs just 6 oz.