Call of Duty MW4 DMZ
Chang-san Air Base in MW4 DMZ

Wider area: Chang-san Air Base. Location context, not a picture of this key or a surveyed doorway.

Keys

Air Base Access Card – Multi Use

Epic

Reported key for access to the Admin Complex No. 2 server room during Iron Citadel; its terminal upgrades this card into the separate single-use Armory Card.

Characteristics

Map
Hajin
Area
Chang-san Air Base
Reported grid
B5
Rarity
Epic

Reported destination and access

The reported mission route finds the card on a desk in one of Iron Citadel's target buildings.

How to get the key

Reported reward: Operation Iron Citadel reward.

Sources: Dexerto. Checked November 4, 2026.