Product DescriptionThe Luth-AR .223/5.56 Mil-Spec Carbine Buffer Tube Complete Assembly Kit is designed for AR-15 builds and upgrades, providing the core recoil system components needed to complete the rear of your lower receiver. This complete kit includes a Mil-Spec diameter carbine receiver extension (buffer tube), standard carbine buffer, carbine recoil spring, receiver end plate, and castle nut for a reliable Mil-Spec carbine buffer setup.Product Highlights Complete AR-15 carbine buffer tube assembly kit for new builds or recoil-system conversions Mil-Spec diameter carbine receiver extension for compatibility with Mil-Spec patterned stocks Includes carbine buffer and carbine recoil spring for a ready-to-install setup Includes receiver end plate and castle nut to finish lower receiver installation Mil-Spec carbine buffer system components built for consistent function and fitSpecs Brand: Luth-AR Product Type: Mil-Spec carbine buffer tube complete assembly kit Compatibility: AR-15 rifles / AR-15 platforms Included Components: Mil-Spec diameter carbine buffer tube (receiver extension), carbine buffer, carbine recoil spring, receiver end plate, castle nut Material: 6061-T6 aluminum (buffer tube) Finish: Hard coat anodized Length: 7.25 in Weight: 9.84 oz MPN: 223-M-BAP UPC: 859819007096Disclaimer: 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.