Designed for law enforcement, sportsmen, and competitive shooters alike, these hydraulic buffers help reduce recoil, while diminishing wear and tear on parts. The sealed hydraulic cylinder is made of 17-4 stainless steel and features a nickel-plated cylinder rod with a high-impact striker cap. Hydraulic buffer easily replaces standard mass and spring buffer. Built to Mil-Spec standards, and U.S. Army tested, these buffers have been demonstrated to reduce cyclic rates, helping save ammunition and improve accuracy.