The Wespe used a PzKpfw II Ausf F chassis that was lengthened and the engine was moved forward. The fighting compartment was at the rear and was open to the top and rear.
Was named the Wespe but Hitler ordered the name dropped on February 27, 1944.
The muzzle velocity was 470 m/s / 1,542'/s. The HE shell weighed 32.7 lbs and was fired at a muzzle velocity of 1,772'/sec. The range was 11,679 yards. If the gun was fitted with a muzzle brake and an Fernladung (extra charge) then the range was 13,450 yards.