Air Base Access Card - Multi Use in MW4 DMZ
The Air Base Access Card - Multi Use opens locked doors around Chang-san Air Base. Unlike the armory card, it can be used more than once. Its description names grid B5, at Chang-san Air Base. Found during the Operation Iron Citadel Story Mission. The upgrade terminal at Admin Complex No. 2 turns it into the single-use Airbase Armory Keycard.How to get the key
Last updated Game version: Launch (October 23, 2026)
Quick answer
- Where
- Chang-san Air Base, Tac-Map grid B5
- The door
- Locked doors around Chang-san Air Base.
- What is inside
- Not confirmed yet. Loot changes every match.
- Getting the key
- Found during the Operation Iron Citadel Story Mission.
- Threat there
- Extreme at Chang-san Air Base
Where the Air Base Access Card - Multi Use is
| Location | Chang-san Air Base |
| Tac-Map grid | B5 |
| Rarity | Epic |
| Highest threat at Chang-san Air Base | Extreme |
The Tac-Map grid runs letters from west to east and numbers from north to south, so B5 is column B, row 5. See Chang-san Air Base on the interactive Hajin map, and the threat level by area in our Chang-san Air Base location guide.
What the Air Base Access Card - Multi Use opens
Locked doors around Chang-san Air Base. Unlike the armory card, it can be used more than once. The key card is Epic.
How to get the Air Base Access Card - Multi Use
Found during the Operation Iron Citadel Story Mission. The upgrade terminal at Admin Complex No. 2 turns it into the single-use Airbase Armory Keycard.
Keys can go in your Stash between deployments, but anything outside a Secure Slot is lost if your exfil fails. Tick the keys you have in the MW4 DMZ key finder; the list stays in your browser.
Other keys at Chang-san Air Base
- Supreme Leader's Bunker Access Card: The Supreme Leader's Bunker, deep in the Chang-san Air Base Bunker.
- Air Base DRC Weapons Locker (grid B6): The DRC Weapons Locker in the secure armory deep in the air base's bunker.
- Airbase Armory Keycard - Single Use (grid B5): The armory in the Chang-san Air Base Bunker, whose door reads "Requires Air Base Armory Access Card". The card says it works once.
- Weapons Mod Workshop (grid B5): A weapons workshop at Chang-san Air Base.
- Commandant Office (grid B5): The commandant's office on the second floor of Admin Complex No. 2.
- Field Depot - B5 (grid B5): The Field Depot door at Chang-san Air Base, in the area the Tac Map labels Field Depot.
Every locked door at Chang-san Air Base and the key for each: Chang-san Air Base Armory in MW4 DMZ: How to Get In.
Questions
Where is the Air Base Access Card - Multi Use used in MW4 DMZ?
At Chang-san Air Base, grid B5 on the Tac-Map. It opens locked doors around Chang-san Air Base. Unlike the armory card, it can be used more than once.
How do you get the Air Base Access Card - Multi Use?
Found during the Operation Iron Citadel Story Mission. The upgrade terminal at Admin Complex No. 2 turns it into the single-use Airbase Armory Keycard.
What rarity is the Air Base Access Card - Multi Use?
Epic, as its key card shows.
Every confirmed MW4 DMZ key with its own page
- Counting Room Vault
- Mirae Electrical Room
- Shop Records Room
- Gun Store Weapons Locker Key
- Shopping DRC Locker
- Reactor DRC Locker
- Coin Mining Den
- Supreme Leader's Bunker Access Card
- Roze's Highrise Armory
- Vault Armory
- The Citadel South Wing
- Old Barber Shop
- Rail Depot Storage
- Militia Arms Depot
- Haksan School Armory
- Re-Education Center Annex
- Imjin Mill Foreman's Office
- Hoesik Supply Room
- Air Base DRC Weapons Locker
- Iskra's Control Room
- Netshin IT Room
- Police Weapon Depository
- The Chemist's Secure Armory
- Gangbyeon Apartment B
- Airbase Armory Keycard - Single Use
- Hanex Guard Station
- Lucera Suite 703 Bedroom
- Reactor 02 Control Room
- Utility Maintenance Storage
- Weapons Mod Workshop
- Executive Arms Auction
- Hazard Storehouse
- Police Station Armory
- Mechanic's Shack
- Air Base Access Card - Multi Use
- Commandant Office
- Gas Station Electrical Room
- Jang-ui's Converted Power Room
- Jin-Tae's Private Lounge
- Mill Explosives Lab
- Prison Encampment Storage
- Underground Propaganda Store Room
- The Doctor's Command Office
- South Block Armory
- The Citadel Main Control Room
- The Citadel Secondary Control Room
- Field Depot - B5
- Fire Station Storage
- Gangbyeon Apartment A
- Haejeok Radio Station
- Hanwoori Art Records Room
- Hotel Lucera Lobby
- Kang's Arms Incinerator
Official sources
Continue reading
Next stepGot this key? Tick it off and find the next one in the key finder.MW4 DMZ Keys: Locations and Locked RoomsEvery confirmed DMZ key: where it is, its Tac-Map grid square, which door it opens and what players found inside.Go there Related guides
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