1,140 of these carbines were reportedly manufactured by E. Gwyn and A. C. Campbell's company, the Cosmopolitan Arms Co., to fill an order for the State of Illinois placed through the U.S. Ordnance Department in December of 1861. They were delivered in July 1862. The 5th Illinois Cavalry received over 400, and the majority were used by the 6th Illinois Cavalry during the famous Grierson's Raid that diverted Confederate attention from Grant's Vicksburg campaign. Marked "1114" and "162" on various components.