Where to use the counting room vault key in DMZ in Modern Warfare 4

To utilize the counting room vault key in DMZ in Call of Duty: Modern Warfare 4, you must first acquire it as a reward for completing the Operation Silent Ledger story mission. This key unlocks a specific door inside the Heavenly Luck casino situated in Cheongun Village, potentially granting access to valuable loot. However, locating the precise door amidst numerous enemies proves challenging.

Begin by entering the casino through its main entrance, which is heavily guarded. Turn right upon entering, proceed down a winding corridor with a room featuring three large windows and a door beside it. A double wooden door will appear at the corridor's end; this is where you should utilize the counting room vault key. Alternatively, if entering via the casino's rear, navigate the open casino floor, defeat North Korean soldiers, and cross to the southern side to find a doorway leading to the main entrance hall.

For an easier experience, complete Operation Silent Ledger again to ensure a spawn near the casino. Look for the first main objective marker inside the building, located on the floor above the Aston Martin Dreadnought as an additional reference. Once inside, search for a room containing containers, a weapons locker, and the best loot through another door housing two safes and a pile of cash.

Securing this loot is advised before exfil. Additional guides are available for locating comms modules, high-tenacity fibers, the Netshin Tech Complex, and the optimal traits to select in DMZ.