Schwerer Gustav: Nazi Germany Most Dangerous Weapon in WW2 "Schwerer Gustav, also known as the Heavy Gustav, was a massive railway gun developed by Nazi Germany during World War II. It was the largest gun ever built, weighing a staggering 1,350 tons and measuring 47.3 meters in length!" "Constructed primarily to destroy heavily fortified targets, this behemoth of a weapon had an impressive range of 47 kilometers and could penetrate even the thickest armor. Its sheer size and power made it a fear