An arsenal, a weapons cache, etc. Armoury
A secure area where weapons are stored.
Arsenal
Weapons and ammunition are stored in an armory, magazine, silo, arsenal or at a weapons or ammo dump. In a home they should be stored in a secure safe or chamber/trigger locked with ammunition locked up separately.
armoury
a weapon cache
A secure area where weapons are stored.
they stored them wherever they could hide them
America lolwut
An armoury is a place where weapons are kept (stored).
Medieval weapons were stored in armories. An armory could be a separate building, but could also be just a room in a castle, or at a city wall or other fortification.
supply trench