Overall length 53"; barrel (bore) length 30"; caliber .56 rimfire. Markings: same as Dwight, Chapin & Co. carbines, but none found with "DWIGHT, CHAPIN & CO./BRIDGEPORT, CONN." stamping above agents marks. History of these rifles same as .56-caliber carbines, with serial numbers interspersed in production of carbines (1 through 1850). Evidently only about 650 rifles were completed of the 1,000 set up. Of these, 35 were sold to a U.S. agent in Florida in February 1864 and 600 to Kentucky in April 1864 with the 1,000 carbines.