Hetzer MK2

I've started with the "real" BattleTech Hetzer only to recognize that neither the full design doesn't made any sense. It was based on a "truck" with some sloped armor plates? Ground Preassure aside with those tiny 4 wheels the Hetzer also was to small.
Another issue the 150mm - it should fire 10 high velocity rounds per "shot"... so 10 shots per 200kg - high velocity with this caliber? Not going to happen. 

So I redesigned the AC 20  - you see the long barrel it's a 150mm L41 - it uses a autoloading mechanism with breach loader - 4 shells are 1 shot.  
It uses ECT Technology wich allows the 22kilo SAPHE/APHEX projectiles to reach a muzzle velocity of 1300m/s.

I still have some issues to place 20 clips a 4 shells into the back of the vehicle. 
Maybe the autoloader can only reload a ton of ammunition and need manual loading by the crew between the battles.

I also started to design the "truck" the Hetzer is based off. The truck is a all terrain vehicle with heavy suspension and some internal loading capacity and a comfortable crew compartment.
The Hetzer however has a modified suspension system it only need a simple on because its primary for city fighting.

The crew of 3 persons are loacated in the left part of the body, cannon and engine take the most part of the left. Fuel and battery storage the lower part and the rear and upper part are gun and ammunition only.