MW4 DMZ key · Hajin River Heights
Militia Arms Depot Key Location in MW4 DMZ
The Militia Arms Depot Key opens the armory on the lower floor of the Gangbyeon Apartment B building in Compound Echo, Hajin River Heights. Its description names grid G7, at Hajin River Heights.
Last updated Game version: DMZ Early Access, day 3
Where the Militia Arms Depot is
| Location | Hajin River Heights |
| Tac-Map grid | G7 |
| Rarity | Rare |
| Highest threat at Hajin River Heights | Medium |
The Tac-Map grid runs letters from west to east and numbers from north to south, so G7 is column G, row 7. See Hajin River Heights on the interactive Hajin map, and its threat level by area in our Hajin River Heights location guide.
What the Militia Arms Depot Key opens
The armory on the lower floor of the Gangbyeon Apartment B building in Compound Echo, Hajin River Heights. The key card is Rare.
Confirmed by 2 sources: video 1 at 0:33, video 2 at 0:00. Checked 2026-10-22 (DMZ Early Access, day 3).
How to get the Militia Arms Depot Key
No video we checked shows where this key drops yet. Keys turn up as loot, a Lieutenant you kill may drop the key to their own loot room, and some Story Missions pay keys as rewards. We add the drop here once two players show it.
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 Hajin River Heights
- Gangbyeon Apartment B (grid G7): Gangbyeon Apartment B in Compound Echo, Hajin River Heights.
Questions
Where is the Militia Arms Depot Key used in MW4 DMZ?
At Hajin River Heights, grid G7 on the Tac-Map. It opens the armory on the lower floor of the Gangbyeon Apartment B building in Compound Echo, Hajin River Heights.
What rarity is the Militia Arms Depot Key?
Rare, as its key card shows.
Every confirmed MW4 DMZ key with its own page
- Counting Room Vault
- Mirae Electrical Room
- Shop Records Room
- 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
- 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
- Weapons Mod Workshop
- Executive Arms Auction
- Hazard Storehouse
Sources
- Call of Duty Blog: DMZ Deep Dive Part 1, Hajin environments and threats (October 5, 2026): how keys work
- Call of Duty Blog: Ready for Launch, Modern Warfare 4 Progression and Prestige (October 19, 2026)
Checked against the official posts on October 22, 2026. The key itself comes from players’ videos, linked above at the moment they show it; we only give a key its own page once two different sources agree.
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
EnemiesDMZ Threat Levels, Enemies and BossesThe five threat levels, every enemy type named so far, the Lieutenants and Commanders on the Boss Board, and which places start at Extreme.
Getting startedDMZ Beginner's Guide: FOB and First RunsHow a DMZ deployment works from infil to exfil, which FOB stations open at which level, and what happens when you die.
VehiclesMW4 DMZ Vehicles: List and Aston Martin DreadnoughtEvery vehicle Activision has named for Hajin, what each Paid Infil costs, where to refuel and repair, and the Aston Martin Dreadnought.
Card pictures: Screenshot: Call of Duty: Modern Warfare 4 © Activision (enhanced)