Hangar Allows Inventory Management

You can now install and uninstall weapons and avionics from your vehicle inventory when you are in a hangar expansion at a user airfield!

You accomplish this by visiting the Player Portal while you and your vehicle are in a hangar. Click on the vehicle on the Player Portal and you will see a "Hangar" button appear in the bottom right. (Note: You have to be zoomed in close enough to see the colony layout)