This Firing Pin Stop is fully machined from solid bar stock steel with great care given to radius all corners. Because a quality firing pin stop should fit snugly in place, this part requires fitting to your particular gun. Covered under a lifetime factory warranty.Notes:A series 80 firing pin stop will work in a series 70 1911 however due to the notch in the lower right hand corner of the stop, the notch will be visible once installed