What is old army ruger?

The Ruger Old Army is a black powder revolver that was produced by Ruger from 1972 to 2008. It is a single-action revolver that uses a percussion cap ignition system and can be loaded with up to 45 grains of black powder or a substitute. The Old Army is built on a larger frame than most other black powder revolvers, with a cylinder that can hold six rounds of .45 caliber bullets. It also features a rear sight that is adjustable for both windage and elevation. The Ruger Old Army was popular with black powder enthusiasts and cowboy action shooters and is now considered a collector item.