The place where weapons are stored is commonly referred to as an "armory." An armory can be a facility or building designated for the storage, maintenance, and management of weapons and military equipment. In a broader context, terms like "weapons depot" or "arsenal" can also be used to describe similar locations.
An arsenal, a weapons cache, etc. Armoury
weapons are stored in a tariif
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 secure area where weapons are stored.
a weapon cache
An armoury is a place where weapons are kept (stored).
America lolwut
they stored them wherever they could hide them
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.