Tapco Buffer Tube 6 Position Black Anodized AR-15. Finished with a sleek anodized black coating this buffer tube not only adds a professional touch to firearms but also provides enhanced corrosion resistance for long-lasting performance. With a Mil-Spec diameter this buffer tube ensures compatibility with a wide range of collapsible stocks allowing for easy customization to suit your preferences. Specifications for Tapco TAP22057 Buffer Tube 6 Position Black Anodized AR-15: Manufacturer: Tapco Finish: Anodized Tapco TAP22057 Buffer Tube 6 Position Black Anodized AR-15