The Warne Mfg 7841M Skyline Precision Mount is a USA-manufactured product, crafted specifically with the precision shooter and competitor in mind. Made from a single block of 7075 T6 aluminum billet, it has been designed to withstand the rigorous demands of either competitive or heavy-duty use. Included are two integral recoil lugs and four mounting crossbolts to ensure optimum performance.What sets the Skyline Precision Mount apart is its Stanag rail interface. This feature offers a more accurate mounting alignment and return to zero capability than the traditional Mil Spec 1913 Picatinny interface. However, it still maintains compatibility with all Picatinny rails. This particular model comes equipped with 35mm rings.