The Trijicon Standard 30mm Riflescope Aluminum Rings are made of lightweight but highly durable and have a hardcoat anodized finish. Rings can be attached to a Picatinny rail and have four torx top screws. These aluminum scope rings from Trijicon are designed to be effectively withstand recoil and heavy use. The rings weigh 4.4 oz. and have a .359" height.