What's in the Box Uberti 1873 Single-Action Cattleman Revolver / 357 Magnum Owner's Manual 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. Firearm Specifications Model Number: 343901 Caliber: .357 Magnum Barrel Length: 4.75 in. Overall Length: 10.25 in. Finish: Non-glare matte Cylinder: 6-shot, fluted Number of Grooves: 6 Twist: Right Weight: 2.2 lbs. Grip: 1-pc walnut Materials: Matte Finished Steel, Brass Backstrap and Trigger Guard