John Hall's innovative breech loading rifles were the first breech loading firearm adopted by the U.S. military and the first firearms to be produced with interchangeable parts. They were meant to be issued to Army rifle units, skirmishers, and flank companies. They did not see real combat use until the Black Hawk War and Second Seminole War in the 1830s. They were issued to the 6th U.S. Infantry and used at the Bad Axe Massacre at the end of the Black Hawk War. The rifles had issues with gas leakage, fouling, and stock breakage. Nonetheless, they saw use through the Mexican-American War and Civil War. This "1838" dated rifle has the standard features.