Luth-AR MBA-1 Buttstock is a fully adjustable, ambidextrous rifle stock for .223 and .308 AR-style rifles using an A2 round standard buffer tube. Constructed from super-strong glass-filled nylon in black. Features a cheek piece adjustable both vertically (+1 height) and horizontally, plus extended length of pull (+1 1/16) via extended buttplate. OAL 10.50, weight 18.40 oz. Includes A1 buttstock screw, castle nut, and lock ring. NOT compatible with carbine/collapsible 6-position tubes. Sling swivels, buffer tube, buffer body, spring, and rail sold separately. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.