Centennial Defense Systems MOD4 Stainless Steel Guide Rod Assembly for Smith & Wesson M&P 5in Barrel, TiN, Gold - Coated Rod, Button Head Allen Screw, 16lb Spring, 12827

This eliminates guide rod flex and ensures it will not chip crack or break like plastic guide rods providing a lifetime of reliable service. Flat wound recoil springs are manufactured of certified aerospace spec materials heat treated shot peened and stress relieved to maximize durability.