The SRS Gen 4 stealth recoil spring offers an all-in-one, multi-stage solution that effortlessly takes the place of your usual buffer and spring setup. Its inventive design averts any contact between the buffer spring and the inner wall of the buffer tube, resulting in an operation that's both seamless and hushed. The dual-stage system operates in perfect synchronization, effectively curbing felt recoil by a substantial degree. To bolster longevity and eliminate potential points of failure, we've made a few key changes. The plastic end piece is now secured with a roll pin instead of a screw, the rod features a machined cap for added robustness, and the traditional snap ring has been swapped out for a washer, ensuring enhanced durability.