Panzerkampfwagen VIII Maus was a German World War II super-heavy tank completed in July of 1944. It is the heaviest fully enclosed armored fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed, the turret being attached before the testing grounds were captured by advancing Soviet military forces. In March 1944 the second prototype, the V2, was delivered. It differed in many details from the V1 prototype. In mid-1944, the V2 prototype was fitted with a powerplant and the first produced Maus turret. This turret was fitted with a 128 mm KwK 44 L/55 gun, a coaxial 75 mm KwK 44 L/36.5 gun and a coaxial 7.92 mm MG 34. The V1 prototype was supposed to be fitted with the second produced turret, but this never happened.
