The Colt Walker of 1847 was the most powerful production handgun of the 19th century. Developed jointly by Samuel Colt and Texas Ranger Captain Samuel Hamilton Walker for the Mexican-American War, it weighed 4.5 pounds and fired a .44 caliber ball with a powder charge producing around 500 ft-lbs of energy — comparable to modern .357 Magnum performance. Only 1,100 were made for the US Army. The Walker remains one of the most historically significant and valuable American firearms. Type: Revolver Action: Single-Action Caliber: .44 Caliber Capacity: 6 Year introduced: 1847, USA Weight: 4.5 oz Overall length: 15.5" Status: Discontinued Military use: Yes Intended use: military, collector, historical