Near the end of the war the welded hull M4 Sherman was fitted with the complete cast front from the late hulled M4A1, making the variant called the hybrid.
It was available in both 75mm and 17pdr VC Firefly versions, it had the same properties as the base M4 and shared the same drive train ect. The British used quite a few of them in NWE and the US also had them including the Pacific theater.
The offer consists of an Armourfast M4A3 set (2 models) and 2 hybrid hulls conversions.
If you wish to make the 17pdr version you will need the Armourfast M4 1C firefly model.