800 mm shell, used by Schwerer Gustav and Dora. Largest gun in history. - 9GAG

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1945 - The 12' artillery shells fired by the world's biggest cannon, the Schwerer Gustav. : r/interestingasfuck

The 7 tonne shell could penetrate up to 30m of concrete - 9GAG

Schwerer Gustav, the 800mm railway gun - 9GAG

Allied WWII soldiers standing on a captured Schwerer Gustav railway siege gun. [1134x854] : r/HistoryPorn

The Schwerer Gustav, the largest calibre rifled gun ever used in combat. It was 1350 tonnes in weight, firing a 7 tonne 800mm shell (right) up to 47Km - 9GAG

War - Chan4Chan

What was the frequency of artillery fire during WW1, and what did an average day look like in the trenches? - Quora

The Schwerer Gustav 800mm shell - The largest artillery shell to ever be used - 9GAG

Why did a lot of WW2 military vehicles have a five point star painted on them? - Quora

How large were siege weapons in actuality, and how practical were they? - Quora

Shell of the Schwerer Gustav Railway Gun. - 9GAG

Where is Schwerer Gustav (an 800 mm German railway gun) now? - Quora

The Schwerer Gustav, the largest calibre rifled gun ever used in combat. It was 1350 tonnes in weight, firing a 7 tonne 800mm shell (right) up to 47Km - 9GAG