G'day
@MadBostard ,
After using the tank of your choice on the battlefield you will unlock various specializations to help make your tank an even more threatening machine.
Once you have ranked your tank up, simply go into your company from the main menu or choose to customize the tank within game and you can select the upgrade path of your choice.
Further to this you have the ability to change the look of your tank with various skins you can unlock when weekly challenges arise or alternatively you can buy them with either in-game earned Company Coin or for some Epic skins you can buy them with Battlefields Premium currency called Boins.
I hope this has helped answer your questions 🙂
DICE Team
