Product DescriptionThe Armaspec Stealth Recoil Spring (SRS) Gen 4 is a self-contained, multi-stage drop-in replacement for a standard AR-15 buffer and spring. Designed to keep the buffer spring from rubbing the inside of the receiver extension (buffer tube), it delivers smoother, quieter cycling. Its multi-stage design helps reduce felt recoil, and the included buffer weights let you tune your rifle&';s operation to your setup.Product Highlights Self-contained, multi-stage SRS Gen 4 design for smooth, quiet operation Drop-in replacement for standard AR-15 buffer and spring assemblies Helps reduce felt recoil for improved shooting comfort and control Includes C, H, and H2 buffers for easy tuning and optimization Made in the USA for dependable fit and performance Specs Brand: Armaspec Product Type: Stealth Recoil Spring (SRS) kit Generation: Gen 4 Platform Compatibility: AR-15 Included Buffers: C, H, H2 UPC: 810048492824 Manufacturer Part Number: ARM253-AR15KIT 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.