How to Unlock the Air Base DRC Weapons Locker in MW4 DMZ

The Air Base DRC Weapons Locker is an Ultra-key locked container inside the secure armory beneath Chang-san Air Base in MW4 DMZ. Its location is listed as Tac Map grid B6. To open it, you need the matching Ultra key, an upgraded Armory Card, and the six-digit bunker code from Operation Iron Citadel.

The DRC key only opens the locker. It does not unlock the bunker entrance.

For players collecting MW4 DMZ Items, knowing the difference between these access items can prevent a wasted deployment.

Air Base DRC Weapons Locker Location

B6 identifies the general area, not the exact locker. Inside the armory, turn right from the mission entrance, jump through the side window, and look for the yellow-and-blue DRC locker.

How to Reach and Open the Locker

Operation Iron Citadel is the route to the secure armory. Follow these steps:

• Deploy to Chang-san Air Base through Operation Iron Citadel.
• Find the upgrade terminal in Admin Complex No. 2 and convert the access card into the single-use Armory Card.
• Enter the bunker and collect the three notes containing the six-digit code.
• Use the code shown by your mission tracker at the armory keypad.
• Enter The Armory, turn right, and jump through the side window.
• Find the DRC locker and check its interaction prompt.
• Use the Ultra key to unlock it.

The code changes between deployments, so always use the notes from your current mission. The bunker is an Extreme-threat area, making armor, ammunition, and medical supplies important.

Opening the locker does not complete Iron Citadel. You still need to handle the remaining objectives and extract.

How to Get the Ultra Key

No fixed spawn location has been confirmed. Treat the Air Base DRC Weapons Locker Key as random container loot rather than expecting it from a specific mission or enemy.

Keep these distinctions in mind:

• Iron Citadel does not directly reward this Ultra key.
• It is not a listed DMZ level reward or Vendor stock item.
• The Supreme Leader’s Bunker Access Card is a different key.
• The Armory Card opens the armory entrance, not the DRC locker.

When you find the correct key, check its full name and B6 description before extracting. Avoid selling it just because its listed value is only 100 DMZ Cash. Its main value is access to the Elite Weapons Locker.

What Loot Can You Get

The locker contains changing Elite Weapons Locker loot. There is no confirmed guaranteed reward table.

One reported opening contained a 3-Plate Helmet Armor and a Weapon Manual, but these are examples rather than guaranteed drops.

If you find a Weapon Manual, secure it and extract successfully. Extraction unlocks the corresponding weapon for Gunsmith purchase and grants 5,000 DMZ Cash. The Gunsmith station requires DMZ level 10.

Leave backpack space before opening the locker so you can collect valuable equipment.

Preparation Tips

• Secure the key first: Extract with it instead of forcing an unprepared bunker run.
• Prepare for Iron Citadel: Bring sufficient armor, ammunition, and medical supplies.
• Collect all three notes: You need the current deployment’s code to enter the armory.
• Check the locker prompt: Make sure it matches AIR BASE DRC WEAPONS LOCKER — UNLOCK.
• Plan your extraction: Opening the locker is not the end of the mission.

Players who want more flexibility with supported Multiplayer progression can consider MW4 Bot Lobbies as another option, keeping their preparation separate from demanding DMZ objectives.

For players working toward additional progression goals, CoD MW4 Boosting can also be an alternative to spending all their playtime on repetitive leveling, leaving more time for challenging operations and loot runs.

Common Mistakes

• Trying to use the DRC key on the bunker entrance.
• Confusing the Armory Card with the Ultra locker key.
• Entering an outdated six-digit code.
• Using the Supreme Leader’s key on the DRC locker.
• Opening the container without enough backpack space.
• Assuming a Weapon Manual or specific armor piece is guaranteed.

FAQ

Where is the Air Base DRC Weapons Locker?

Inside the secure armory beneath Chang-san Air Base, in the B6 area. Look for the yellow-and-blue DRC locker.

How do I enter the armory?

Complete the access card upgrade in Admin Complex No. 2, collect the three bunker notes, and enter the six-digit code for your current deployment.

Where can I find the Ultra key?

No fixed spawn is confirmed. Search containers and extract when you find it.

Does the locker guarantee a Weapon Manual?

No. Its contents change between matches.

Does opening the locker finish Iron Citadel?

No. You must still complete the remaining mission objectives and extract.

The Air Base DRC Weapons Locker requires three things: the Ultra key, the upgraded Armory Card, and the current bunker code. The Armory Card gets you inside, while the Ultra key opens the specific DRC container.

Secure the key when you find it, prepare for the Extreme-threat bunker, and check the locker prompt before using it. If a Weapon Manual or valuable armor appears, prioritize extracting it safely.

The U4GM Team