The Panzerjäger Tiger Ausf. B was a German tank destroyer of the Second World War; known more commonly as the Jagdtiger. The ordnance designation for the Jagdtiger was Sd. Kfz. 186. Weighing 71 tonnes, and armed with a 128 mm PaK 44 L/55, it was both the heaviest, and heaviest armored fighting vehicle used operationally during the war. It saw limited service on both fronts from 1944 to the end of the war; with only 88 vehicles built. Tank ace Otto Carius would command a company of Jagdtigers during the war.