Harper's Ferry Rifle Model 1842 Shortened. The barrel and wood under the barrel have both been cut. After the civil war many of these guns were shortened and resold. Marked with 'Harpers Ferry 1851', an Eagle perched over 'U.S.', and 'U.S.' to the butt stock. Several carved letters to the stock. 1851. {Approximate dimensions: 44 inches long.}. Condition: Shortened barrel and wood under the barrel, other potential modifications. There are two holes through the stock and grip.