IS-6 has bonus secret modules

In the IS-6 file from the game folder, you can notice this weird thing: the IS-6 ( a module-less premium) has a second turret and 3 more guns! Check it out:

https://i0.wp.com/i.imgur.com/ansfyg5.png?w=768

This is simply… amazing. What is WG planning to do with all those excess materials?