Product DescriptionThe Midwest Industries Stock Tube Adapter is designed for firearms with a Picatinny (1913) rail interface, allowing you to install an AR-15 style collapsible buttstock that mounts to a mil-spec diameter stock tube on alternative rifle platforms. Built from 6061 aluminum with a hard coat anodized finish, it offers six length-of-pull positions and includes a hollow, water-resistant internal storage compartment for small parts or batteries. This unit does not function as a buffer tube and is proudly made in the USA.Product Highlights Adapts a Picatinny (1913) rail interface to accept a mil-spec diameter AR-15 style collapsible stock tube setup 6-position tube for quick length-of-pull adjustment Integrated water-resistant storage compartment in the tube for small parts or batteries Durable 6061 aluminum construction with Type III hard coat anodized finish Compact, clean design with straightforward installationSpecs Brand: Midwest Industries Manufacturer Part Number: MI-STAP UPC: 812102033158 Interface: Picatinny (1913) rail Tube: 6-position, mil-spec diameter Material: 6061 Aluminum Finish: Type III Hard Coat Anodized Color: Black Overall Length: 6.750 in Weight: 7.5 oz Country of Manufacture/Origin: USA Note: Does not function as a buffer tubeDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.