Build your own fully functional mini cannon with the Traditions Mini Old Ironsides .50 cal. Cannon Kit. You get everything you need to assemble a miniaturized cannon that actually fires. The Old Ironsides is a replica of those that once sat on the deck of the USS Constitution. Build your own mini Old Ironsides cannon .50 caliber 9 inch smoothbore barrel Hardwood carriage .490 round ball diameter 2.125 inch wheel diam. 4 inchh. x 11.5 inchl. 4 lbs. Order today!