The AD-ARCA-TP ARCA To Picatinny Tripod Adapter enables you to attach an ARCA style Tripod to your railed forearm. 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. Features The AD-ARCA-TP Arca To Picatinny Tripod Adapter Mount features the Patented QD Auto Lock™ Lever system which has the following advantages: 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 ensure maximum rail engagement. American Defense Manufacturing ADM AD-ARCA QD ARCA-to-Picatinny Tripod Adapter AD-ARCA-TP-TAC