The Colt Single Action Army (SAA), or Colt Peacemaker (the peacemaker), is a .45 caliber Colt revolver with a single action lock and a 6-round cylinder. It was developed for the United States Cavalry by the Colt Company in 1873 and was perhaps the most prolific weapon in the Wild West. This weapon was manufactured until 1941, with a total of 360,000 units produced. A weapon so effective and formidable at the time that it was said:"God created man, Samuel Colt made them equal". It can be seen in many westerns, which is not realistic, because this revolver was very expensive at the time, but the cavalry used it.
The Colt Single Action Army is sometimes referred to as the Colt .45 and should not be confused with the M1911 semi-automatic pistol which is also sometimes referred to as the Colt .45.