Centennial Defense Systems MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson M&P 5in Barrel w/Flat Face Screw TiN Gold. This eliminates guide rod flex and ensures it will not chip crack or break like plastic guide rods providing a lifetime of reliable service. The screw tip is easily removed to allow the user to change spring weights and fine tune the recoil spring to the ammunition of choice. Specifications for Centennial Defense Systems MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson M&P 5in Barrel: Manufacturer: Centennial Defense Systems Fabric/Material: Stainless Steel Gun Make: Smith & Wesson Gun Model: Smith & Wesson M&P 5in Package Contents: Centennial Defense Systems MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson M&P 5in Barrel Allen Key What firearm models does the manufacturer say Centennial Defense Systems MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson M&P 5in Barrel is compatible with? The manufacturer says that Centennial Defense Systems MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson M&P 5in Barrel is compatible with Smith & Wesson M&P 5inCentennial Defense Systems 13363: MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson M&P 5in Barrel w/Flat Face Screw TiN Gold