Overall length 40" (artillery), 37" (cavalry); barrel length 24" (artillery), 21" to 21.5" (cavalry); caliber .58. Markings: As on Cook & Brother rifles (New Orleans production) artillery and cavalry carbines were produced in New Orleans in a separate serial range from the rifles. Total production is thought not to have exceeded 225, divided evenly between 1861 and 1862 dates. In addition to the overall and barrel lengths, the main difference between the artillery and cavalry carbines is the manner in which they were carried. The former bears standard sling rings on the upper band and the trigger guard strap, the latter has a bar with a ring on the left side of the stock. Both are exceedingly rare.