The Colt Single Action Army revolver, alternately known as the Peacemaker, Model P, or Frontier, is the most popular handgun on the American Frontier and the definitive firearm of the Old West. The Single Action Army action is a refinement of the earlier Colt percussion revolvers and the Colt 1871 cartridge revolver. The cylinder is mounted on a central axis and operated by a hand with a double finger whose more extended action allowed the cylinder-ratchet to be cut in a larger circle, giving more torsional force to the cylinder. The Single Action Army NRA Centennial was produced to celebrate the 100th anniversary of the NRA in 1971. This special commemorative revolver features a blade front sight with a rear notch and a case-hardened frame and comes with the original wooden presentation box. Its grips, metal, and bore are all in very good condition.