Grooved, fully relieved and lightened spur gives positive, no-slip thumb grip. Gold Cup-style, repositioned hammer strut hole reduces full cock spring pressure for a crisp, lighter feeling trigger pull. Hammer hooks are precision ground to .020', squared, ready for light stoning/final polish. Narrowed half-cock notch prevents sear nose damage. SPECS: EDM from carbon steel, bar stock. Fits Series 70 and
80. Gunsmithing required.