The Model 1855 Springfield was a rifled musket used in the mid-19th century. This is a type of musket that was used to fire long-range shots, before the enemy could get close enough. It was produced by the Springfield Armory in Massachusetts, United States.
Springfield Model 1855 Media
Diagram of a Springfield Model 1855 rifled musket and bayonet from "Rules for Management & Cleaning of the Rifle Musket – Model 1855" Washington Government Printing Office, 1862
Diagram of a Springfield Model 1855 rifled musket's lock mechanism from "Rules for Management & Cleaning of the Rifle Musket – Model 1855" Washington Government Printing Office, 1862
Springfield Model 1855 with Maynard tape primer mechanism
Springfield Model 1855 pistol-carbine