# How to use counting room vault key in DMZ

https://www.polygon.com/mw4-modern-warfare-4-dmz-counting-room-vault-key-casino-location/

The counting room vault key is earned in DMZ mode by completing 'Operation Silent Ledger'. It unlocks a door in Heavenly Luck casino, located in Cheongun Village. The door contains valuable loot.

Image: https://static0.polygonimages.com/wordpress/wp-content/uploads/2026/10/modern-warfare-4-dmz-counting-room-vault-header.jpg

#dmz #callofduty #vault #casino

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Created: 2026-10-30T13:43:08.713408+00:00

Last edited: 2026-10-30T13:43:08.713408+00:00

Board: 3

Origin: Syndicated

Original source: https://www.polygon.com/mw4-modern-warfare-4-dmz-counting-room-vault-key-casino-location/