Around 50,000 of these carbines were manufactured between 1863 and 1865 for the Union Army. Spencer carbines are easily one of the most advanced and popular weapons of the war and remained important in the Indian Wars of the latter half of the 19th century, especially prior to the widespread adoption of the Springfield trapdoor. This example has a period applied tin plating with otherwise standard markings and features including its original six-groove rifling and has not been altered with a Stabler cutoff.