The Union Security Gun Cage is located on the second floor of the Union Security safehouse in The Last Stand: Union City. An officer named Richards took the key to the gun cage, thus leaving the other officers defenseless except for G17 Pistols. The player is given a quest to track down Richards, which is found dead at the end of the Penhock Subway Station. The key to the gun cage can be found by searching him.
Inside the cage are: