The kit can only be built stock as a Leopard 2A6 (or A5 with a shorter gun barrel) with the add on armor. It would require some slicing and dicing to turn it into an A4 or lower. The bolt on armor is actually part of the plastic turret castings and there is not actual 'turret front' that the real one has (minus the armor). The drivers hatch, gun mantle, and such would have to be seriously reworked, too I believe.