The Soviet heavy howitzer B-4 with a caliber of 203.2 mm (8 inches)

The 8.8 cm Flak 36/37 is a German heavy anti-aircraft gun, a development of the Flak18 cannon. Compared to the original, the gun barrel has changed, and now it had a split core tube. The gun mount and the undercarriage were also changed. These changes allowed the gun to be maneuvered both forward and backward. In the Flak 37 version, the communication system with the battery control unit has been modernized. Like the Falk 18, the Flak 36/37 was characterized by great vertical and horizontal flight parameters as well as great armor penetration.