American Defense Manufacturing Holosun 509T QD Mount Titanium Lever Lower 1/3 Co-Witness Mount Height Black. The AD-509T-TL QD mount is a one piece unit that offers low co-witness and lower 1?3 co-witness optic height. The mount is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented Titanium QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. Specifications for American Defense Manufacturing Holosun 509T QD Mount Titanium Lever: Manufacturer: American Defense Manufacturing Color: Black Finish: T3 Mil-Spec Anodize Gun Make: AR Platform Gun Type: Pistol Fabric/Material: 6061-T6 Aluminum Red Dot Sights-Footprint: Holosun 509T Optic Cut: Holosun HE509T Condition: New Additional Features: Titanium Lever Features of American Defense Manufacturing Holosun 509T QD Mount Titanium Lever The AD-509T-TL QD mount features the Patented Titanium QD Auto Lock Lever system. 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. 30percent lighter than our standard mounts. Precision machined from 6061 T6 Aluminum. Finished in hard coat type 3 Mil-Spec anodize for a rock hard lasting finish. Features the Patented Titanium QD Auto Lock Lever system which is fully adjustable to fit both in spec and out of spec rail systems. Package Contents: American Defense Manufacturing Holosun 509T QD Mount Titanium Lever American Defense Manufacturing AD-509T-11-TL: Holosun 509T QD Mount Titanium Lever Lower 1/3 Co-Witness Mount Height Black