This model has a 22" part-round, part-octagonal barrel. Chambered for .44 rimfire cartridge. Has outside tang and extractor. Stock and forearm are walnut, with a barrel band sling swivel. Buttstock bears an oval cartouche surrounding inspector's marks "MM". These letters also appear stamped on major metal parts. Government ordered 1,509 for use in Civil War. Barrel was marked same as rifle.