The Trijicon 30mm Riflescope Steel Rings are made of high quality steel and have a parkarized finish. Rings can be attached to a Picatinny rail and have four torx top screws. These high strength steel scope rings from Trijicon are designed to withstand heavy recoil as well as extreme/combat conditions. The rings weigh 7.4 oz. and have a .389" height.