Centennial Defense Systems MOD3 Stainless Steel Guide Rod Assembly for Smith & Wesson M&P 5in Barrel, Black - Coated Rod, Torx Screw, 16lb Spring, 12610

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.