Little is known about this weapon, which was found by US forces in a German testing ground. It is believed that it was a smooth bore cannon similar to the PAW 600 that had to shoot 3 kg shell with hollow charge. He used the carriage of sFH 18 (of the late style). It is not clear the purpose of that weapon because the gun was disconnected from the recoil system to travel, no doubt to avoid a whiplash in the barrel, but such a slow maneuver does not take place in an anti-tank gun. It was probably just an experimental weapon.