 The "Hickok rifle" has a 29 5/8 inch barrel, which is longer than the carbine version's barrel and shorter than the rifle version's barrel, and also has a Kentucky rifle style sloped butt.The trapdoor mechanism is stamped with the year 1870, and the lockplate is stamped with the year 1863, indicating that this rifle was originally produced as a Model 1863 musket and was later converted as part of the model 1870 manufacturing.The name "J.