American Defense Manufacturing Leupold Mark 4 HAMR Mount Black. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. Specifications for American Defense Manufacturing Leupold Mark 4 HAMR Mount: Manufacturer: American Defense Manufacturing Fabric/Material: 6061-T6 Aluminum Color: Black Weight: 2.4 oz Fit: Leupold Mark 4 HAMR Finish: T3 Mil-Spec Anodize Hand: Ambidextrous Gun Type: Rifle Features of American Defense Manufacturing Leupold Mark 4 HAMR Mount Does not require proprietary tools for adjustment. Can be adjusted with your finger or a flat blade screwdriver. Lever can be configured to lock to the front or the rear. Superior clamping surface to insure maximum rail engagement. Fully adjustable to fit both in spec and out of spec rail systems. Package Contents: American Defense Manufacturing Leupold Mark 4 HAMR Mount American Defense Manufacturing AD-HAMR-STD: Leupold Mark 4 HAMR Mount Black