1911 9mm 70 Series Firing Pin. Using our in house CNC Swiss turning centers the 1911 firing pins are machined from domestic 17-4 Stainless Steel then Heat Treated to a Rc44 to 47. We machine the firing pin from Stainless to help eliminate internal corrosion issues and improve reliability. Heat treating the firing pins to H900 condition gives them high strength and great toughness. Pin Length 2.292 inches Nose diameter 0.075 The 1911 single action, semi-automatic piston served as standard issued side arm for the US Armed Forces from 1911 to 1985. Today, many companies manufacture the 1911 in both the .45 ACP and the 9mm.
