Product DescriptionThe Geissele Automatics AR-15 Premium Mil-Spec Buffer Tube Assembly with Super 42 Spring is a complete, high-performance upgrade designed for demanding AR-15 builds. This assembly features a carbine-length premium mil-spec buffer tube machined from 7075-T6 aluminum and finished in Type 3 hardcoat anodize for strength, durability, and corrosion resistance. Paired with Geissele&';s Super 42 braided buffer spring and an H3 buffer, this setup is engineered to improve reliability, reduce spring fatigue, and minimize the common spring twang felt and heard through the stock. Built to mil-spec standards and made in the USA, it is compatible with most mil-spec diameter AR-15 stocks and includes a mil-spec castle nut and end plate for a complete installation package.Product Highlights Complete AR-15 buffer tube assembly with premium mil-spec tube, Super 42 spring, and H3 buffer 7075-T6 aluminum carbine buffer tube with durable Type 3 hardcoat anodized black finish Super 42 three-strand spring design helps reduce spring fatigue, failure, and unwanted recoil spring noise Provides approximately 15% greater average return force than a standard buffer spring for reliable cycling Includes mil-spec castle nut and end plate, and fits most mil-spec diameter AR-15 stocks Specs Brand: Geissele Automatics Manufacturer Part Number: 08-163B-H3 UPC: 817953026991 Product Type: AR-15 buffer tube assembly Buffer Tube Type: Mil-Spec Length: Carbine Buffer Weight: H3 Color: Black Material: 7075-T6 aluminum Finish: Type 3 Hardcoat Anodize Stock Positions: 6 Buffer Tube Weight: 3.7 oz Compatibility: Fits most mil-spec diameter AR-15 stocks Included Components: Buffer tube, Geissele Super 42 spring, H3 buffer, mil-spec castle nut, end plate Country of Manufacture: USA Disclaimer: 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.