This firing pin stop is designed to function in any 70 series .45 ACP 1911 handgun. This firing pin stop has a classic blued finish, adding an attractive look to your favorite 1911 pistol. Its hardened steel construction provides the perfect balance between strength and flexibility for improved firing pin retention and lockup.Caliber: .45 ACPFits: 70 seriesStainless steel or Blued finish for an attractive lookHardened steel construction for a balance between strength and flexibility