The Burris Extreme Xtra High Tactical Scope Rings Set are made of strong, lightweight aluminum with a scope-anchoring 6-screw array for unfailing durability and precise return-to-zero results. These scope rings are engineered for reliable tactical use, easily handling heavy recoil and high-frequency shooting, making them equally at home on hot-barreled varmint rifles and magnum hunting rifles. Mount rock-solid to Picatinny- and Weaver-style bases. Precision-machined aluminum rings 6-screw mounting system Engineered for tactical use Handle recoil with ease