rock island arsenal model 1903 serial number ranges rock island arsenal 1903 serial numbers Download ... sized serial numbers in the range 1 through 50,000 without letter or number prefix ... U.S. Rifle , caliber .30 , Model 1903 , marked “ Rock Island Arsenal , ” with .... Colt , single action Army revolver , caliber .357 , serial number 356015 ... U.S. Rifle , Model 1903 , manufactured by Spri..