The set consists of a turned barrel with muzzle brake, resin mantlet and photo-etched parts. A turned co-axial MG34 machine gun barrel is included.
When in 1942 the amount of Soviet units using T-34 increased and a medium tank for Panzerwaffe was being planned only, the German decided to modernize KwK40. Now it had 48 calibres and ammo was much better.
The set includes a barrel with a double baffle muzzle brake typical for the G version. It is designed based on blueprints. The gun mantlet is redesigned making it larger in diameter with improved weld seams.