The ARMASPEC STLTH RECOIL SPRING AR10 G4 enhances shooting performance with its innovative design. Engineered for optimal function, the Stealth Recoil Spring SRS GEN4 provides a drop-in solution that minimizes friction and maximizes recoil reduction, allowing for a smoother firing experience. 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. Upgrade your rifle's performance with the ARMASPEC STLTH RECOIL SPRING AR10 G4.