American Defense Manufacturing Burris FastFire QD Mount Titanium Lever Lower 1/3 Co-Witness Mount Height Black. Also fits the Doctor mini red dot Hex Wasp/ Dragonfly red dots and Vortex Viper/ Venom Red Dot sights. It features the Patented QD Auto Lock(tm) Titanium Lever system to accommodate both in spec and out of spec rail systems. Specifications for American Defense Manufacturing Burris FastFire QD Mount Titanium Lever: Manufacturer: American Defense Manufacturing Color: Black Finish: T3 Mil-Spec Anodize Fabric/Material: 6061-T6 Aluminum Co-Witness: Lower 1/3 Red Dot Sights-Footprint: Docter Optic Cut: Burris Fastfire Weight: 2 oz Additional Features: Titanium Lever Mount Type: Picatinny Gun Rail: Picatinny Features of American Defense Manufacturing Burris FastFire QD Mount Titanium Lever 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. Precision machined from 6061 T6 Aluminum. Hard coat anodized for a lifetime of performance. Fully adjustable to fit both in spec and out of spec rail systems. Features the Patented QD Auto Lock Titanium Lever system. Package Contents: American Defense Manufacturing Burris FastFire QD Mount Titanium Lever American Defense Manufacturing AD-22-11-TL: Burris FastFire QD Mount Titanium Lever Lower 1/3 Co-Witness Mount Height Black