Dicker Max

The 10.5 cm K gepanzerte Selbstfahrlafette (10.5 cm gun on armoured self-propelled mount), also known as the Panzer Selbstfahrlafette IV Ausf. A (Pz.Sfl. IVa) (Self-propelled anti-tank gun IV model A) was a prototype self-propelled gun used by Nazi Germany during World War II. Although it was originally designed as a Schartenbrecher ("bunker buster") for use against the French Maginot Line defences, following the defeat of France in 1940, it was evaluated for use as a tank destroyer on the Eastern Front.