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MW4 DMZ key / Ultra
Reactor DRC Locker
The Reactor DRC Locker is used at Haneul Nuclear Reactor, Reactor 02 (grid H4). Underwater locker in the irradiated pool of Reactor 02 (the western pool). Bring a hazmat suit or gas masks.
H4 Haneul Nuclear Reactor, Reactor 02
- Door
- Underwater locker in the irradiated pool of Reactor 02 (the western pool). Bring a hazmat suit or gas masks.
- Video route
- Drop down into Reactor 02 and clear the small room, then turn left straight into the water; the locker is underwater. Player report, not checked by the guides.
- Inside
- Elite Weapons Locker: a weapon manual, an Epic weapon and a 3-plate vest have been seen.
- Get the key
- Mission reward Reward from Operation Fallen Ember.
One community map puts it in I4.
Other keys in Haneul Nuclear Reactor
Data updated 2026-10-30. Sources: COD Central — MW4 DMZ keys · DMZ Codex — keys and loot rooms · mw4map.com — key locations · dmzmap.com — key locations and locked rooms · 哆啦A东_DMZ无人区 — key room spots and routes (Bilibili video series)