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The Calypso Cannon features a 38mm bore capable of shooting golf balls or any projectile that size. Each Calypso is made to order and is made completely by hand. From the USA steel to the hand forged brackets and bolts it is as much a museum or office piece as a machine of war. Shipping for the Calypso is local pickup or truck freight only. Weighing in around 160 pounds it’s a beast.