Centennial Defense Systems MOD1 Stainless Steel Guide Rod Assembly w/o Spring for Smith & Wesson SD9 & SD40 4in Barrel, w/Flat Face Button Head Screw, Glock Tan, 13319

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.