American Defense Manufacturing QD Base For Swivel Model Harris Bipods Black. Not compatible with the Tac Lever (Lever interferes with the bipod itself). It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. 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 QD Base For Swivel Model Harris Bipods: Manufacturer: American Defense Manufacturing Color: Black Finish: Anodized Fabric/Material: 6061-T6 Aluminum Features of American Defense Manufacturing QD Base For Swivel Model Harris Bipods 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. Package Contents: American Defense Manufacturing QD Base For Swivel Model Harris Bipods American Defense Manufacturing AD-BP-P2-STD: QD Base For Swivel Model Harris Bipods Black