Traditions™ .69 Caliber Old Ironsides Cannon - CN8052British guns proved no match for the enormous deck guns of the U. S. S. Constitution. Traditions Old Ironsides Cannon is a smaller replica of the authentic version of those cannons featuring authentic styled naval carriage and barrel. This cannon is fully operational, and is accurate in scale and detail. It has the look and feel of a working piece of artillery, and is shipped ready to display or fire. The Old Ironsides Cannon comes with . 69 caliber