Luth-AR MBA-2 Buttstock is a lightweight rifle stock for AR-15 platforms using an A2 round standard buffer tube, fitting .223 and .308 AR-style rifles. Constructed from super-strong glass-reinforced nylon in black. Length 10.375, weight 11.20 oz. Includes A2 buttstock screw, castle nut, and lock ring. Ergonomic 21st-century profile; compatible with optional add-on cheek piece and butt plate assemblies (sold separately) for extra height and length of pull. NOT compatible with carbine/collapsible 6-position tubes. Sling swivels, buffer tube, buffer body, and spring sold separately. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.