Colt Government Mark IV Series 70- 45 Cal

On this model, Colt added a safety feature in the form of a firing pin block system that made it impossible for the weapon to discharge if dropped or thrown on a hard surface.  The new Colt Series 80 also incorporated the new barrel bushing of the Series 70, while being more reminiscent of the original M1911 by having a long trigger and flat mainspring housing.