Traditions Mini Old Ironsides Cannon Kit .50Cal - Working artillery, fully operational cannons. All are accurate in scale and detail. Own and build your own piece of history. The Old Ironsides is a replica of those that sat on the deck of the USS Constitution..50 cal. smooth bore, 4 lbs, 9", barrel, 11 1/2", long. The Mini Old Ironsides Kit provides the most savings when compared to the factory completed versions, and this is one of the most fun and educational to build. .50 Caliber9" Smoothbore Barrel.490 Round Ball Diameter2.125" Wheel Diameter4" Height11.5" in LengthHardwood CarriageWeight: 4 lbs