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Message * Superguns Karl-Gerät, V-3 cannon, Parrott rifle, Big Bertha, Nuclear artillery, Schwerer Gustav, Paris Gun, List of the largest cannons by caliber, Mons Meg, Supergun, Project Babylon, Columbiad, 21 cm K 12, Dardanelles Gun, Tsar Cannon - 1156632501 - 9781156632505