The AD-BP-P2 Bipod Mount enables you to attach a Harris-S, Swivel bipod to your railed forearm. Not compatible with the Tac Lever (Lever interferes with the bipod itself). It features the Patented QD Auto Lock(tm) Titanium Lever system to accommodate both in-spec and out-of-spec rail systems; can be adjusted with your finger or a flat blade screwdriver; lever can be configured to lock to the front or the rear and superior clamping surface to insure maximum rail engagement.