Similar in appearance to Military model, with these notable exceptions. No provision for attaching a bayonet, sling swivels and it has sporting-style sights. Buttplate is crescent shaped. This model has been noted chambered for .56-caliber in 5-shot version and chambered for .36-, .40-, .44- and .50-caliber in 6-shot variation. Quite scarce in .40- and .50-caliber and will bring a 10 percent premium. Standard markings are "Colt's Pt/1856" and "Address Col. Colt/Hartford Ct. U.S.A." Production on this model was quite limited (several hundred at most) between 1856 and 1864.