.58 caliber. 12" barrel. SN: NSN. Bright finish, brass furniture, walnut stock. Single shot percussion muzzleloading pistol carbine with Maynard's patent automated priming lock and captive swivel ramrod. Lock marked U.S./SPRINGFIELD at the front and ated 1856 at the rear, with a {Spread-Winged American Eagle} on the primer magazine door. Breech with small V/P/{Eagle Head} inspection marks and dated 1855 under the rear sight. No cartouches are present on the counterpane. The rear of the butt cap has the batch mating number 2 on it. Retains the original folding leaf rear sight and musket style front sight, sling ring in butt and sling swivel on barrel band. The pistol carbine is accompanied an original detachable stock complete with the attachment yoke and swivel in the toe. These stocks are less often encountered than the pistol carbine itself. The top of the buttplate tang is marked US and the yoke has a partially legible batch mating number that may be 5. This gun is from the Collection of Charles Worman, co-author of the two volume set Firearms of the American West. The US Model 1855 Pistol Carbine was a European inspired idea that mated an overly long and ungainly handgun with a detachable stock, creating a poorly handling pistol or a short carbine with a wobbly stock. As such, the design was not particularly popular with the men they were issued to. Only 4,021 of these ungainly and relatively unpopular pistol carbines were produced at Springfield between 1855 and 1857 and today they are relatively scarce.