1873 Single-Action Cattleman - Hunter In 1873, Colt&';s single-action Army (SAA) revolver became the Army&';s standard sidearm. Cavalry troopers were armed with the new revolvers. Lawmen and outlaws alike were quick to adopt the handy new 6-shooter which earned the nickname "Peacemaker." Specifications Caliber or Gauge .44 Magnum Barrel length (Inches) 7.5" Chamber (Inches) - Choke - Product Type Revolver Ideally suited to match the 1873 Hunter Rifle, the 1873 Hunter Revolver sports an unfluted cylinder and full length 7A 1/2" barrel to exploit today&';s best hunting loads. The revolver comes with an extended, 1860-Army style grip to afford a positive hold; also in the box is a Picatinny rail (hardware included) that may be mounted by hunters who prefer an optical sight. Model Number - 345496