Gangbyeon Apartment B is an Uncommon key in MW4 DMZ. It opens apartment block B at Compound Echo in Hajin River Heights, grid G7, and turns the whole block into a stronghold full of AI and containers. Below is where we found the key, where the door is and what we looted floor by floor.
- The key spawns loose around Compound Echo. Ours lay on a bookshelf in an apartment just south-west of block B, one of several possible spots.
- The door is the glass double door of apartment block B at Compound Echo, Hajin River Heights (G7).
- Opening it unlocks a stronghold with AI on every floor. Compound Echo was Medium threat in both of our runs.
- 21 to 27 containers across the block in our two runs, with two W.M.D. Manifests and an Epic VEL 46 as our best finds.
Where the Gangbyeon Apartment B Door Is
Gangbyeon Apartment B is at Compound Echo in Hajin River Heights, grid G7. The block stands behind a row of concrete barriers, and the key opens the glass double door at the top of the front steps. The prompt reads Gangbyeon Apartment B, and the banner says Stronghold Unlocked. Compound Echo was a Medium threat area in our run. You can also find the door under the keys layer on our interactive MW4 DMZ map.
Click to enlarge Apartment block B behind the barriers. 
Click to enlarge The glass doors with the prompt, brightened. 
How to Get the Gangbyeon Apartment B Key
The Gangbyeon Apartment B key is a loose key that spawns in different places around Compound Echo. We found ours on a bookshelf in an apartment just south-west of block B. To get there we went down into the underground car park, across to the stairs and up into the apartment. Treat that spot as one example, because the key can lie in other apartments too. We will add more spots as we find them. Every other key and the door it opens is in our MW4 DMZ keys guide.
Click to enlarge Our key on the bookshelf, brightened. 
The Route to the Door
- Go to Compound Echo in Hajin River Heights and find apartment block B behind the concrete barriers.
- Walk through the gap in the barriers and up the front steps.
- Use the key on the glass double door. The banner says Stronghold Unlocked and the block is open.
What Is Inside Gangbyeon Apartment B
Block B is a full apartment building, and the loot is spread over its floors. We worked through the apartments twice and opened 21 containers the first time and 27 the second. There are dressers, jackets, luggage and a duffel in the bedrooms, caches and a supply crate in the living rooms, two military lockers and a weapons locker, computers and a gaming computer, a footlocker, an equipment case, an armor box and a military bag. The Militia Arms Depot, one flight up the stairs from the front door, has its own key, and you can only reach it after this key has opened the block.
Containers
- 2 to 4× Cache
- 1 to 4× Military Bag
- 2 to 3× Computer
- 3× Locker
- 1 to 2× Duffel
- 1 to 2× Jacket
- 1 to 2× Luggage
- 2× Medicine Cabinet
- 2× Military Locker
- 1 to 2× Supply Crate
- 1× Armor Box
- 1× Dresser
- 1× Equipment Case
- 1× Footlocker
- 1× Gaming Computer
- 1× IT Bag
- 1× Refrigerator
- 1× Rifle Case
- 1× Weapons Locker
The containers decide the loot. Tap one to see what it can drop in our loot data.
Best finds in our runs
-
W.M.D. Manifest Epic$5,000 -
2-Plate Helmet Armor Vest Epic$2,500 -
VEL 46 Epic$2,400 -
Degraded Execution Footage Rare$2,000 -
Encrypted Archive Rare$2,000 -
Nuclear Program Files Rare$2,000 -
Comms Module Epic$1,500 -
Bomb Glider Epic$1,000 -
Medkit Epic$1,000
Loot per run
- W.M.D. Manifest ×2 Epic $5,000 each Cache, Footlocker
- 2-Plate Helmet Armor Vest Epic $2,500 Footlocker
- VEL 46 Epic $2,400 Weapons Locker
- Degraded Execution Footage ×3 Rare $2,000 each Cache, Weapons Locker, Loose in the room
- Encrypted Archive Rare $2,000 Gaming Computer
- Comms Module Epic $1,500 Gaming Computer
- Bomb Glider Epic $1,000 Weapons Locker
- Medkit Epic $1,000 Supply Crate
-
Medium Backpack Rare $1,000 Military Bag -
Infantry Invasion Plans ×4 Uncommon $1,000 each Cache, Loose in the room, Jacket -
Regional Combat Notes ×2 Uncommon $1,000 each Supply Crate -
Type 73 Uncommon $1,000 Cache -
Control Unit Uncommon $200 Computer -
Electronic Sensors Uncommon $200 Computer -
Reactive Metals Uncommon $200 Weapons Locker -
Rigid Synthetics ×2 Uncommon $200 each Luggage -
WZ.55 Striga Common $200 Cache -
Prison Encampment Storage key Rare $100 Luggage -
Bandage ×2 Uncommon $100 each Cache, Luggage -
Heartbeat Sensor Uncommon $100 Cache -
Sedative Inhaler Uncommon $100 Supply Crate -
Throwing Knife ×2 Uncommon $100 each Luggage, Equipment Case -
Trip Wire ×2 Uncommon $100 each Weapons Locker, Military Locker -
C4 ×2 Common $50 each Weapons Locker, Military Locker -
Claymore Common $50 Supply Crate -
Proximity Mine Common $50 Loose in the room -
Screamer Mine Common $50 Loose in the room -
Smoke Grenade Common $50 Equipment Case - AR/LMG Ammo ×18 Cache
-
Armor Plate ×9 Cache, Military Bag, Military Locker, Armor Box -
Chemicals ×23 Cache, Jacket, Dresser -
Electronics ×17 Gaming Computer, Duffel -
Metals ×9 Jacket, Computer -
Synthetics ×23 Computer, Luggage, Duffel
Plus 2 items we could not identify.
- Encrypted Archive Rare $2,000 Loose in the room
- Nuclear Program Files ×2 Rare $2,000 each Gaming Computer, Loose in the room
-
MAR-9 Rare $1,700 Weapons Locker -
2-Plate Armor Vest Rare $1,000 Military Bag - Medium Backpack Rare $1,000 Weapons Locker
-
Ballistic Flight Logs Uncommon $1,000 Loose in the room - Infantry Invasion Plans Uncommon $1,000 Rifle Case
- Regional Combat Notes Uncommon $1,000 Supply Crate
-
CPU Rare $500 Computer -
Small Backpack Uncommon $500 Supply Crate -
Rezi 12 Common $300 Rifle Case -
Biomaterials Uncommon $200 Cache - Control Unit Uncommon $200 Computer
- Electronic Sensors ×2 Uncommon $200 each Gaming Computer, Computer
- Reactive Metals Uncommon $200 Military Bag
- Rigid Synthetics ×3 Uncommon $200 each Military Bag, Duffel
-
Warlord Common $200 Supply Crate -
Smelling Salts ×2 Rare $100 each Supply Crate, Medicine Cabinet - Bandage ×2 Uncommon $100 each Military Bag, Footlocker
-
Drill Charge Uncommon $100 Footlocker -
Pain Killers Uncommon $100 Supply Crate - Sedative Inhaler Uncommon $100 Supply Crate
-
Stim ×4 Uncommon $100 each Supply Crate, Cache, Footlocker, IT Bag - Throwing Knife ×2 Uncommon $100 each Supply Crate, Duffel
-
Energy Drink Common $50 Refrigerator -
Molotov Cocktail Common $50 Supply Crate - Screamer Mine Common $50 Supply Crate
-
Semtex Common $50 Loose in the room -
Shock Stick Common $50 Weapons Locker - Smoke Grenade Common $50 Loose in the room
-
Thermite Common $50 Military Bag - Armor Plate ×8 Military Bag, Footlocker, Locker
- Pistol/SMG Ammo ×9 Rifle Case
- Chemicals ×29 Cache, Medicine Cabinet, Refrigerator, Jacket, Luggage
- Electronics ×15 Computer, Duffel, IT Bag
- Metals ×12 Gaming Computer, Medicine Cabinet, Dresser, Luggage
- Synthetics ×25 Computer, Duffel, Medicine Cabinet, Dresser
Plus 1 item we could not identify.
From 2 openings in our own runs. The best finds cover all of them, and the run buttons show what one opening held. Loot is random, so your room can roll differently, and we add every new run of this key. Values are per item, from the in-game tooltips. The loot value adds up every item with a known value and the cash, so it is a lower bound: crafting resources and items without a value are not in it.
Missing this key? Other players trade spare keys on our DMZ Trading board, item for item.
The valuables were the highlight. A MINA MS41 footlocker held a W.M.D. Manifest worth $5,000 next to an Epic 2-Plate Helmet Armor Vest, and a weapons cabinet gave a second W.M.D. Manifest with a Type 73. The weapons locker had an Epic VEL 46 and a Bomb Glider, and the gaming computer a Comms Module and an Encrypted Archive. Degraded Execution Footage turned up three times, and a luggage case even held a Prison Encampment Storage key. Over the whole block the loot was worth at least $37,650 that time. Our second run was quieter, with no Epic gear, but it still gave two Nuclear Program Files and an Encrypted Archive worth $2,000 each, Ballistic Flight Logs, a Rare MAR-9, a 2-Plate Armor Vest and a Medium Backpack, and our loadout value went up by $13,200.
Click to enlarge The footlocker with the W.M.D. Manifest, brightened. 
Is the Gangbyeon Apartment B Key Worth It?
Yes. The key spawns around the compound every match, and in game we have even seen more than one. The apartment block has a lot of containers with a bit of everything, from valuables to weapons, gear and crafting parts. There are enemies inside, so take that into account, and the loot is spread out over the whole building, so it takes a while to clear. But if you are nearby, definitely grab this key and loot the building.
Frequently Asked Questions
Where do you find the Gangbyeon Apartment B key in MW4 DMZ?
It is a loose key that spawns in different places around Compound Echo at Hajin River Heights. We found ours on a bookshelf in an apartment just south-west of block B, reached through the underground car park. That is one example spot, so check the apartments around the compound.
Where is the Gangbyeon Apartment B door?
At Compound Echo in Hajin River Heights, grid G7. It is the glass double door at the front of apartment block B, the building behind the concrete barriers. The prompt reads Gangbyeon Apartment B, and opening it unlocks the whole block as a stronghold.
What is inside Gangbyeon Apartment B?
The whole apartment block, floor by floor. We looted it twice and opened 21 and 27 containers across the apartments, from dressers and jackets to caches, weapons lockers and computers. Our best finds were two W.M.D. Manifests, an Epic VEL 46, a 2-Plate Helmet Armor Vest, a Bomb Glider and a Comms Module in one run, and two Nuclear Program Files, an Encrypted Archive and a Rare MAR-9 in the other.
Is Gangbyeon Apartment B dangerous?
It is a stronghold, so AI guard every floor once you are inside. Compound Echo was a Medium threat area in both of our runs. Clear one apartment at a time and watch the stairwells.
