Production shifted from typewriters to various military weapons and parts during World War II. In October 1942, Smith-Corona Typewriter Company began producing M1903A3 Springfield rifles at its plant in Syracuse, with assistance from Remington Arms and High Standard Manufacturing Company. Subcontractor barrels give unusual collector value to some of these 234,580 Springfield rifles. Serial numbers 3608000 to 3707999 and 4708000 to 4992000 carry the Smith-Corona name on the receiver ring. While many M1903A3 rifles manufactured by Remington have 2-groove barrels, most rifles assembled by Smith Corona used 4-groove barrels manufactured by High Standard, and approximately five thousand of the barrels finished by High Standard were from 6-groove barrel blanks made by Savage Arms.