The Colt Single Action Army was introduced in 1873 after much development, and the addition of key features including a solid top strap and chambering for the .45 Colt cartridge—there have been other calibers. The original revolver was intended to give troopers an edge against aboriginal tribesman. One requirement was that the revolver be effective against Indian war ponies at 100 yards. However, civilians and lawmen needed a faster handling revolver. Something more handle-heavy than barrel-heavy, and which might be drawn quickly from a well-fitted holster was needed.