Click the purchase cost and confirm purchase.

Now the module displays the purchase cost in credits. Click the cost and confirm researching.If you have enough Combat XP, the research cost is displayed on a green background. The amount of Combat XP required to research modules is displayed on the unresearched modules. Click Research in the upper-right corner of the Garage to access the current vehicle's Tech Tree.You will need credits and experience to research new modules: Combat Experience earned in an Elite vehicle can be either used to accelerate crew training, or converted to Free Experience. Vehicles with all modules and subsequent vehicles researched acquire Elite status.To move to the next tier, you have to research a certain number of modules of the current vehicle.Better modules enhance your vehicle's characteristics.IS-4 and Bat.-Châtillon 25 t can still be upgraded). You can upgrade modules on any regular vehicle except for most Tier X vehicles (e.g. Currency Exchange and Resource Conversion.

Common Tests and Sandbox Tests: Your Definitive Guide.

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