Approximately 75,000 to 100,000 of these rifle-muskets were manufactured by Colt during the Civil War loosely based on the British Pattern 1853 "Enfield" rifle-muskets. This "1864" dated rifle-musket has the standard markings and features including "2402 M.N.M" stamped on the left of the barrel at the breech, "AM" on the buttplate, and "2402 stamped on the left of the buttstock. Includes a "US" marked socket bayonet.