The Luth-Ar MBA4f Skullaton Stock Assembly FDE is a lightweight, glass-filled nylon carbine stock designed to mount to AR-style carbines, offering a 21st-century look, ergonomic feel, and quick installability for all .223 and most .308 AR carbine rifles. This stock weighs just 9.5 ounces and uses four of the six possible positions on a mil-spec or commercial buffer tube, delivering precise cheek alignment with a Picatinny rail and a revolutionary anti-rattle set screw to minimize movement under recoil. Its easy to add our cheek piece to gain an additional 1 inch of cheek height and optional butt plate assemblies to extend the length of pull by 1 1/16 inches, enhancing comfort during extended sessions at the range or in the field. The MBA-4 adapts to existing commercial and mil-spec tubes, though some aftermarket commercial tubes with a diameter over 1.1172 inches may not fit, and the stock is not interchangeable with A2 standard tubesMBA-1 or MBA-2 rifle buttstocks are recommended for those configurations. Available in Black or Flat Dark Earth, this stock blends modern aesthetics with dependable ruggedness, providing a streamlined upgrade for carbine builds while maintaining compatibility with a wide range of AR platforms.