This is the 14205th most frequent Russian word.
оружейной
"Оружейной" means "weapon-related" or "pertaining to firearms."
Used as an adjective describing the type of workshop.
Он работает в оружейной мастерской.
He works in a weapon assembly workshop.
Used attributively to specify the factory produces weapons.
Её семья живёт возле оружейной фабрики.
Her family lives near a weapons factory.
Used in a general attributive sense, implying the shop sells weapon-related items.