The transition rifle between the old smoothbore muskets and the Model 1861. Chambered for the Minie ball in the new standard 58 caliber and equipped with a Maynard tape primer system that proved unreliable in field conditions. Type: Rifle Action: Muzzleloader Caliber: 58 Cal Capacity: 1 Year introduced: 1855, USA Weight: 9.5 oz Overall length: 56" Status: Discontinued Military use: Yes Intended use: Military Service