Heavy-duty rings and bases are built to withstand extreme service without movement or loss of zero. Larger contact area between the scope/rings and base/receiver for less chance of movement. Large hex nuts on rings allow fast torquing of cross bolts for easy adjustment. Non reflective, matte finish. Mounting screws and Torx^® head wrench included. 

Steel Rings - CNC machined from solid 11L17 cold-rolled bar stock, then blued. 

Aluminum Rings – CNC machined from 7075 T651 aluminum alloy and hardcoat anodized for maximum strength and wear resistance. SPECS: Steel or aluminum, matte black finish Rings - 1' (2.5cm) or 30mm (1.18in) inside diameter. Height from top of base to center of ring for both 1' and 30mm: Med. - .84' (2.1cm); High - 1.06' (2.7cm); Super High - 1.4' (3.5cm).