"pieces at the Springfield Armory"
The Springfield Armory
Public DomainThe Springfield Armory

 The Springfield Armory in Connecticut was the leading US site for the research and production of military arms. Originally established by George Washington, the armory was used throughout the American Revolution as a military base, and afterwards as a storage and research facility. By the mid-nineteenth century, the Springfield Armory was involved in bringing the technological advances of the Industrial Revolution to bear on the manufacture of arms; it made particular use of interchangeable parts and mass production.