This simply bolts onto your under carriage pic rail, and wings out the sides to allow the simple holding of the rifle against a vertical or horizontal support (such as a post, wall, log, etc). The barricade support also has a slot through the curved axis for finger and thumb through control techniques. Left and Right hand version available (based on the pic rail clamping piece direction). Machined from solid billet 6061-T6 and hard black anodised. Weight 100g / 3.52oz.