Springfield Model 1873

The Model 1873 "Trapdoor" Springfield was the first standard-issued breech-loading rifle adopted by the United States Army (although the Model 1866 trapdoor had seen limited issue to troops along the Bozeman Trail in 1867). The gun, in both full-length and carbine versions, was widely used in subsequent battles against the American Indians.

Springfield Model 1873 in Southern Victory
The Springfield Carbine was the standard issue rifle of the US Army during the Second Mexican War. It was considered an even match for it's Confederate counterpart and performed admirably during the war.