🇩🇪 🇩🇪 Karl-Gerät “Big Boy”: WWII Super-Heavy Mortar The Karl-Gerät, or “Big Boy”, was a massive German siege mortar built by Rheinmetall from 1940–1942. Weighing 124–127 tons, its 600 mm gun fired 4,780 lb shells that could penetrate over 8 ft of concrete. Seven were made, seeing action at Brest-Litovsk, Sevastopol, the Warsaw Uprising, and attempts on the Ludendorff Bridge. Its size required special cranes and disassembly for transport. — x.com/aviationarchive 📱