Colt Walker of Texas had been the major purchaser of the early Paterson Holster Pistol (No. 5 model), a five shot cal .36 revolver, and Samuel Walker became familiar with it during his service as a Texas Ranger. In 1847, Walker was engaged in the Mexican-American War as a captain in the United States Mounted Rifles. He approached Colt, requesting a large revolver to replace the single-shot Aston Johnson holster pistols then in use. The desired .44-.45 caliber revolver would be carried in saddle mounted holsters and would be large enough to dispatch horses as well as enemy soldiers. The Colt Walker
Colt Dragoon Revolver Second Government Contract, The "fluck Dragoon" was erroneously derived. The First Model Colt Dragoon Revolver production began in 1848, stemming from Colt's Second Government Contract. It has oval cylinder stops, a V-type mainspring, no wheel on the rear of the hammer, and a square back trigger guard. Colt produced about 7,000 first models between 1848 and 1850. The Second Model has rectangular cylinder notches. Until the no. 10,000 the V-shaped mainspring was standard and then replaced with a flat leaf mainspring and a wheel on the hammer at its bearing on the mainspring. All the Second Model Dragoons have the