Waffenträgerschreitpanzer "Läufer"
The Armored Walking Weapons Carrier "Läufer" [runner] was a highly mobile self-propelled field artillery piece.
It mounted a short-barreled 75mm cannon in the main body, a MG 34 ring-mount around the main hatch [used for anti-aircraft defense], and a pair of 20mm cannon under a right side "wing" plate.
Seen here is a Läufer is taking on fuel, ammunition, and oil in an Eastern Front forest.
The Läufer favored this sort of terrain, as it tended to be too thick for most tanks and allowed for secure firing positions.
It was popular among the infantry, who liked having close-in artillery support capable of traversing almost any terrain.
The Läufer was a bipedal armored combat machine, designed to accompany infantry, snipe at enemy armor, and generally serve as an all-terrain self-propelled gun.
It had a squat blocky body mounted on two short legs. The howitzer was set to the right of the pilot, with the twin 20 mm cannon mounted to a fixed wing on the far right of the vehicle.
The primary access hatch was behind the howitzer, while the vehicle's engine was directly behind the driver's compartment.
It was roughly 12' tall, 10' long, and 8' wide, weighing 20 tons, and had a top speed of 26 miles per hour, with a crew of three [driver, gunner, loader]).
The Läufer was used on both fronts, and was especially popular in the thick forests of Russia and the broken farmlands of France.
Although not especially well armored, its size and shape made the vehicle easy to hide, and the Allies often found them tucked into barns, factories, deep ditches, thick stands of trees, and the like.
As the howitzer was of limited use against enemy armor, the Läufer was usually used to shell troops in the open or soft vehicle targets -- such as jeeps and trucks. The 20 mm cannon was often used to help spot targets for the howitzer, and tracer rounds were a common load. The MG 34, on the other hand, was meant for close defense and as an anti-aircraft weapon.
Although several hundred Läufer were made, they had little overall impact on the course of the war.
While fine anti-infantry weapons, their high silhouette and thin armor made them walking [literally] targets for Allied tank gunners and ground-attack pilots.
Also, as the war progressed, and parts became scarce, many Läufer were simply abandoned upon experiencing a mechanical failure, although a few were made into semi-fixed artillery platforms.