maya springfield 1861 rifled musket - 1861 Springfield Musket Rifle by TubaMirium

The Springfield Model 1861 was a Minié-ball - type rifled musket shoulder arm used by the United States Army and Marine Corps during the American Civil War. Commonly referred to as the 'Springfield' (after its original place of production, Springfield, Massachusetts), it was the most widely used U.S. Army weapon during the Civil War, favored for its range, accuracy, and reliability.
The Model 1861 was certainly a step forward in U.S. small arms design, being the first rifled shoulder weapon to be produced on such a large scale.