Product DescriptionThe CMMG Receiver Extension Kit is designed to help you complete an AR-15 pistol lower group when paired with your preferred lower parts kit. This kit includes a CMMG pistol receiver extension (buffer tube) in a black finish, a carbine buffer assembly, and a carbine action spring, along with an ambidextrous sling mount end plate for flexible sling setup on your build.Product Highlights Receiver extension kit for AR-15 pistol and AR-platform pistol lower builds Includes CMMG pistol receiver extension (buffer tube) with black finish Carbine buffer assembly and carbine action spring included for reliable cycling Ambidextrous sling mount end plate supports left or right side sling attachment Ideal companion kit when finishing a pistol lower group with a lower parts kitSpecs Brand: CMMG Manufacturer Part Number: 55CA65A UPC: 815835017099 Platform Fit: AR-15 / AR Platform (pistol) Color: Black Included Components: Pistol receiver extension (buffer tube), carbine buffer assembly, carbine action spring, ambidextrous sling mount end plateDisclaimer: 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.