47,115 Model 1855 rifle-muskets were manufactured at Springfield Armory between 1857 and 1861, and another 12,158 were produced at Harpers Ferry. The 1855 was the first U.S. martial arm designed for Minie bullets in .58 caliber and were a considerable advantage over earlier military rifles. They were widely used in the Civil War and first saw action in the Coeur d'Alene War in the Pacific Northwest in 1858. It has the standard markings and early features including the long range rear sight with an 1858 dated lock and barrel (faint). Includes a U.S. socket bayonet.