Own a piece of history with the Traditions Mini Old Ironsides Cannon Kit, which features a replica of a cannon that sat on the deck of the USS Constitution that you can build yourself. Accurate in scale and detail, the miniature cannon has a hardwood carriage and 2-1/8" diameter wheels as well as a 9" smooothbore barrel that is capable of firing .50 caliber round balls with diameters of .490.