Originally a Civil War muzzleloading U.S. Springfield rifle-musket that was one of a reported 5,020 subsequently converted c. 1869 to a breech loader using the Needham side opening system for use with centerfire cartridges, as used by the Fenian Brotherhood, an Irish-American secret society. These rifle-muskets were famously used in the Fenian raids on Canada after the Civil War. "IN" stamped on the left stock flat, indicating ownership by the Fenian Brotherhood. "1862" dated "SPRINGFIELD" marked lock. Includes a "US" marked socket bayonet.

Very good, retains patterns of darkened case colors on the breech area, scattered heavy freckling overall, gray and brown patina on the bright surfaces, and some areas of mild pitting. Stock is fine as arsenal refinished, with scattered scratches and dents, and a repaired spliced section on the right ahead of the breech. Mechanically fine. Bayonet is very good.