The Colt Single Action Army, also known as the Single Action Army, SAA, Model P, Peacemaker, M1873, and Colt .45 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.
The Colt SAA has been offered in over 30 different calibers and various barrel lengths. Its overall appearance has remained consistent since 1873. Colt has discontinued its production twice, but brought it back due to popular demand. The revolver was popular with ranchers, lawmen, and outlaws alike, but as of the early 21st century, models are mostly bought by collectors and re-enactors. Its design has influenced the production of numerous other models from other companies.
The Colt SAA "Peacemaker" revolver is a famous piece of Americana known as "The Gun That Won the West". The original length of the barrel, issued to the U.S. Cavalry, was 7-1/2 inches (with an overall length of 13 inches.
The gun is Nick Franco, Ed Zacharias' 2nd in command, weapon of choice