Armaspec ARM253-BB SRS-BB Recoil Spring Silver AR-15 Gen4

The Stealth Recoil Spring™ SRS™ GEN4 is a self-contained multi-stage drop-in replacement for your standard buffer and spring. It is designed to keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth, quiet operation and to reduce felt recoil significantly. The new GEN4 version features design improvements to eliminate failure points including a roll pin replacing the screw across the plastic end piece and a machined cap on the rod.