Recoil assembly for Taurus G3 and G3XL. Stainless steel guide rod, sleeve and end screw with Black DLC finsh.  BLACK DLC COATING on the end screw. A very hard, black, Physical Vapor Deposition finish is used on the end screw.  FINISHES. Metal parts that rub together or make contact with other metal parts will get visibly marked, scratched, or burnished. Even very hard finishes, like the black nitrite and gold TiN finishes we use will wear and that will be visible. Stainless parts will also get scratched, burnished, and show where they rub and touch other parts. This is normal and is not a defect.