replica Colt Single Action Army, also known as the Single Action Army, SAA, Model P, Peacemaker and M1873, is a single-action revolver with a revolving cylinder holding six metallic cartridges. It was designed for the U.S. government service revolver trials of 1872 by Colt's Patent Firearms Manufacturing Company—today's Colt's Manufacturing Company—and was adopted as the standard military service revolver until 1892.