Product DescriptionUpgrade your AR-15 lower with the Armaspec Stealth Recoil Spring (SRS) Gen 4 Buffer Tube Kit, a complete enhanced buffer tube kit designed to help deliver smoother, quieter cycling while reducing felt recoil. This kit includes a mil-spec 6-position 7075-T6 receiver extension (buffer tube) along with a steel castle nut and end plate, plus the SRS Gen 4 multi-stage recoil buffer system. The self-contained SRS design helps prevent the buffer spring from rubbing against the inside of the buffer tube for more refined operation and improved shooting comfort.Product HighlightsComplete AR-15 buffer tube kit includes SRS buffer system, 6-position buffer tube, end plate, and castle nutSRS Gen 4 self-contained, multi-stage recoil system helps reduce felt recoil and improve cycling feelDesigned to minimize spring-to-tube contact for smoother, quieter operationMil-spec 7075-T6 receiver extension (buffer tube) for durable, lightweight performanceBB configuration with 5.7 oz equivalent buffer weight for AR-15 pattern firearmsSpecsBrand: ArmaspecManufacturer Part Number: ARM263-BBUPC: 810048492879Platform Fit: AR-15 pattern firearmsSystem: Stealth Recoil Spring (SRS) Gen 4, multi-stage recoil buffer systemBuffer Type/Configuration: BBEquivalent Buffer Weight: 5.7 ozReceiver Extension: Mil-spec 6-position buffer tubeReceiver Extension Material: 7075-T6 aluminumIncluded Hardware: Steel castle nut and end plateCountry of Origin: USADisclaimer: 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.