Samuel Hamilton Walker and General Winfield Scott's armies. Walker is best known as the co-inventor of the famous "Walker Colt" revolver, along with arms manufacturer Samuel Colt. Walker is said to have self-funded a trip to New York City to meet with Colt and proposed to him the concept of a weapon based on the then-popular five-shot Colt Paterson revolver, with many enhancements such as adding a sixth round, being powerful enough to kill either a man or a horse with a single shot and quicker to reload . Colt's firearms company was no longer in business, but the large order allowed Colt
Colt Single Action Army Action Army, serial number 1, thought lost for many years after its production, was found in a barn in Nashua, New Hampshire in the early 1900s. It was chambered in .45 Colt, a centerfire design containing charges of up to of fine-grained black powder and a blunt roundnosed bullet. Relative to period cartridges and most later handgun rounds, it was quite powerful in its full loading. The Colt Single Action Army revolver, along with the 1870 and 1875 Smith & Wesson Model 3 "Schofield" revolver, replaced the Colt 1860 Army Percussion revolver. The Colt quickly gained favor over the S&W