Abstract: A treadle assembly for throwing armor piercing shaped charges or squash charges against the underside of armored vehicles has a tripping batten connected at an angle or cant to a lever arm or leg which leg holds an armor-penetrating munition on its far end. The batten and lever arm structure is such so that the munition is oriented in the correct direction when the assembly is deployed on the surface of the ground, such as a field or roadway. The munition has a firing pin which, when armed, extends upwardly to contact the underside of the armored vehicle when the vehicle wheel or tread pushes over the treadle plate thereby pivoting the lever arm and raising the munition.