Product DescriptionThe Bravo Company BCM Mil-Spec Carbine Stock Hardware Mounting Kit provides the essential components needed to install a Mil-Spec carbine stock assembly on an AR-15 lower receiver. This complete mounting kit includes a Mil-Spec 6-position receiver extension (buffer tube), receiver end plate, castle lock nut, M4 carbine action spring, and carbine buffer assembly-making it a reliable choice for new builds, replacements, or upgrades. It is designed to work with a wide range of popular collapsible stocks, including BCM, VLTOR, LMT, Magpul CTR-M, Stag Arms, Colt, and others.Product Highlights Complete Mil-Spec mounting kit for AR-15 carbine stock installation on the lower receiver Includes Mil-Spec 6-position receiver extension (buffer tube), end plate, castle nut, action spring, and carbine buffer Compatible with many common collapsible stocks (BCM, VLTOR, LMT, Magpul CTR-M, Stag Arms, Colt, and more) Ideal for building, repairing, or upgrading AR-15 buffer tube/stock mounting hardware Durable, duty-ready components designed to Mil-Spec dimensionsSpecs Brand: Bravo Company Manufacturer Part Number: BCM-STOCK-HARDWARE-KIT UPC: 855877004404 Platform Compatibility: AR-15 (Mil-Spec carbine receiver extension) Receiver Extension: Mil-Spec, 6-position Kit Includes: Receiver extension (buffer tube), receiver end plate, castle lock nut, M4 carbine action spring, carbine buffer assembly Receiver Extension Material (as listed by retailers): 7075-T6 aluminum Color (as listed by retailers): BlackDisclaimer: 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.