12.8 cm FlaK 40 - was a high power, long range German anti-aircraft gun from WW2. It was the heaviest and most effective anti-aircraft gun of its era and for decades after the war. It weighed a minimum of 12 tons, and when mounted on a turret, it weighed 26 tons. It used a special charge that allowed its projectiles to reach targets 3x faster than anything else. 450 of these were made and placed primarily around Berlin. A rapid-fire prototype was made but never produced in any numbers.