The Armoury is one of the human's most important structures as they need it to buy weapons, armor, upgrades and ammunition. It never runs out of stuff as items are teleported into it from a central storage depot.
Unlike the Armoury from Tremulous, our model should have a round or square (or otherwise equally sided) footprint to fit well into the square bounding boxes. It shoud have roughly the height of a human and its footprint should be as big as or slightly smaller than that of the Reactor:
If you are going with a square design, the four sides could correspond to the different item cathegories (weapons, body armour, misc equipment, ammo) but no actual item should be visible. A modular/slot system of some sort could work. Maybe the german packstation can inspire you. Other sources of inspiration could be a gun safe or a vending machine, but in the end you'll probably have to come up with something unique, as real world examples of futuristic teleportation armories are rare.