The Armoury can first be accessed when the HQ reaches level 2. It is a place to store weapons. If there are any weapons that you are not currently using, they will be stored here so that they are available for future gladiators to use. Here, you can also sell old weapons to make more space for new ones. As you upgrade the armoury you gain more storage space for your weapons meaning you can have more at any given time. You also gain XP points for your city level upon upgrading. In order to upgrade the armoury the HQ needs to be at a certain level.