MW4 DMZ Counting Room Vault key: find the casino's main-floor door

Stay on the casino’s main floor and search behind the Cashier area. The Counting Room Vault key does not open Silent Ledger’s basement mission vault, even though both destinations are inside Heavenly Luck Casino.

Get the key ready before travelling

Operation Silent Ledger lists the key among its rewards. Use the Story Mission walkthrough if you still need to complete that mission.

Before the room visit, move the key from your FOB Stash into your deployed loadout. Read the complete name: Counting Room Vault. The casino also has a separate Vault Armory key, which points to underground parking.

The key’s F4 reference identifies the search area. Use the existing Counting Room map marker to plan your approach, then confirm the interior landmarks and door name in game.

An additional field pickup has been observed in an industrial locker on the Rice Mill catwalk route at Imjin Farmland. This is one recorded find, not a guaranteed recurring spawn. Silent Ledger remains a separate reward route.

Find the main-floor entrance

1. Enter the casino and remain on the main gaming floor.
2. Locate the Cashier shopfront and search the staff rooms behind it. Look around that area rather than taking the basement elevator.
3. Find the counting-room entrance: a dark wooden door with keypad-style hardware and a fingerprint reader nearby.
4. Read the interaction prompt. It should name HEAVENLY LUCK CASINO COUNTING ROOM.
5. Use the unlock interaction with the matching key, then inspect the room and its containers.

The lock’s displayed name matters more than the appearance of its keypad. This is a key-room interaction, not a request to recover the numerical password from another mission.

Which casino destination do you need?

Destination	Correct route or requirement
Counting Room Vault	Main-floor Cashier/staff area; Counting Room Vault key
Vault Armory	Underground parking; its separate Vault Armory key
Silent Ledger mission vault	Follow the mission’s generator, security and basement drill sequence

If you are waiting beside the mission drill or searching the underground armory, return to the main-floor route for this key. If your goal is to finish Silent Ledger, follow its objective tracker rather than treating this optional key room as a substitute.

Loot without assuming a guaranteed reward

Search the containers actually present and inspect their item cards. A recipe or weapon seen in another run is not a guaranteed result from every opening. Leave backpack space before the visit and protect an important pickup in an eligible Secure Slot where available.

After looting, reassess the exfil route. For other unfamiliar locks, use the Key Finder and key-room guide. If the lock specifically asks for a mission code, use the keypad guide instead.