Springfield Armory is located in Massachusetts

The Springfield Armory, located in the city of Springfield, Massachusetts, was the primary center for the manufacture of U.S. military firearms from 1777 until its closing in 1968. The site is preserved as the Springfield Armory National Historic Site, Western Massachusetts' only unit of the national park system. It features the world's largest collection of historic American firearms.

• http://en.wikipedia.org/wiki/Springfield Armory