4.2 cm Pak 41
The 4.2 cm Pak 41 was a light issued to German airborne units in World War II. This gun was externally similar to the 3.7 cm Pak 36, using a modified version of the latter's carriage, but used the squeeze bore principle to boost its velocity, and hence armour-piercing ability. The bore had a diameter of at the chamber, but tapered down to at the muzzle. Production was terminated in June 1942, after the delivery of 313 guns. By November 1943, 47 remained in service.Specifications
