DMZ key and locations in Modern Warfare 4

There are loads of DMZ keys in Call of Duty: Modern Warfare 4. Used to open both locked containers and locked doors, keys are your fast-track to getting your hands on some of the best loot the extraction mode has to offer. However, when you receive a key, you’re only given a brief description of where to use it, so we’re going to outline where you can use every key the game has to offer.

Here are all the keys we’ve found in Modern Warfare 4’s DMZ mode and where to use them, listed in alphabetical order by the name of the key.

Note that this guide is a work-in-progress, so if the key you’re looking for isn’t listed here, check back soon.

Blackmarket weapons locker key

The left-hand side of the image shows the player looking at the blackmarket weapons building while the right-hand side shows the location of the two buildings marked on the in-game map with a star icon.

The blackmarket weapons locker key can be used in two different locations in Hajin. Look for the blackmarket weapons store, identifiable by its iron wrought gates and red advert on the roof. One of them is in southern Deadtown, while the other is in eastern Hanrin Village. Go to the basement to find two lockers at each location, so if you have a second blackmarket weapons locker key, it’s worth bringing with you.

Coin mining den key

The left-hand side of the image shows the player looking at the building with the coin mining den inside while the right-hand side shows the location marked on the in-game map with a star icon.

Along with finding it as loot in Hajin, the coin mining den key can also be obtained by completing the “Operating Shopping Hacks” story mission. It opens a door on the third floor of an otherwise unassuming building directly north of the Netshin Tech Complex and east of the gas station found to the west of the NuriGO Mall. Inside, you’ll find a number of lootable containers, including plenty of server racks, which are handy for electronic sensors.

Counting room vault key

The left-hand side of the image shows the locked counting room vault door in DMZ while the right-hand side of the image shows the location marked on the in-game map with a star.

Completing the “Operation Silent Ledger” story mission will net you the counting room vault key, but to use it, you’ll need to go back into the casino. Our dedicated guide explains exactly where to go, but briefly, you’ll want to take an immediate right-hand turn as you enter through the main entrance then go through the brown door in the following corridor. You’ll find a bunch of safes, loose cash, and containers inside.

Executive arms auction key

The left-hand side of the image shows the player looking at the place the key can be used while the right-hand side of the image shows the location marked on the in-game DMZ map with a star icon.

The executive arms auction key can be used inside the DBN Headquarters building, which is the tallest skyscraper inside The Grid. If you choose the “Operation Shopping Hacks” mission, you’ll spawn nearby. This place is highly fortified, so there are loads of enemies around, and to find the locked room, you’ll need to use the various elevators and ziplines dotted around to go to the very top floor (but not the roof). Here, you’ll find the locked door pictured above.

Gangbyeong apartment A key

The Gangbyeong apartment A key can be used on an apartment block at the northeastern end of Hajin River Heights. The building is next to the compound, and is the one that is perpendicular to the river to the south. If you need to get inside Gangbyeon apartment A without the key, then you can descend into the parking lot below and search for the staircase that will take you up inside the apartment block.