Enhance your shooting experience with the ARMASPEC Stealth Recoil Spring BB, engineered for unparalleled performance. The Stealth Recoil Spring SRS GEN4 offers a seamless drop-in replacement for your standard buffer and spring, ensuring optimal functionality and a quiet operation. Drop-in replacement for standard buffer and spring Reduce felt recoil Keep the buffer spring from rubbing against the inner wall of the buffer tube Buffer mass is designed to stay under constant tension against the bolt carrier Made in the U.S.A. Experience the next level of precision shooting with the ARMASPEC SRS GEN4, designed for serious enthusiasts.