The Chemist’s Secure Armory is a Legendary key in MW4 DMZ. It opens Lieutenant The Chemist’s bunker at the Haneul Nuclear Reactor, grid I4, just inside the radiation zone, and the bunker holds a Lieutenant crate, two weapons lockers and spare gas masks. Below is where the door is, how to get the key, the short walk to the door and what we found inside.
- The door is a concrete bunker with white double doors on the northeast side of the Haneul Nuclear Reactor (I4), just inside the radiation zone.
- The Chemist drops the key.
- A gas mask is all you need to get there, and the bunker has fresh gas masks inside.
- The Lieutenant crate is the prize, and two weapons lockers give you more shots at a good weapon. Ours held at least $32,050 in loot.
- The key is single use, so loot the whole bunker before you leave.
Where The Chemist’s Secure Armory Is
The armory is a concrete bunker built into a bank of earth on the northeast side of the Haneul Nuclear Reactor compound, grid I4. It sits a few steps inside the radiation zone, so the fog is thick when you walk up to it. The entrance is a pair of white double doors in a grey concrete frame, with a cable drum on a pallet to the left of it. You can also find it under the keys layer on our interactive MW4 DMZ map.
Click to enlarge The bunker in the radiation fog. 
Click to enlarge The doors with the unlock prompt. 
How to Get The Chemist’s Secure Armory Key
Lieutenant The Chemist drops the key. He sits deep in the radiation zone of the reactor, and Lieutenants do not drop their key every time, so expect to kill him more than once before it falls. How to find him and what to bring is in our Boss Board guide, and surviving the reactor is covered in our Fallen Ember walkthrough. Every other key and the door it opens is in our MW4 DMZ keys guide.
The key also counts for the order Keep Out (Hornet’s Nest 2 of 2), which asks you to loot a Lieutenant’s Key, enter a Lieutenant’s Room and loot the Lieutenant’s gun. The gun is in the Lieutenant crate inside this bunker. The full order is in our DMZ Orders guide.
The Route to the Bunker
- Head for the northeast side of the reactor compound. Put on a gas mask before you cross into the radiation zone.
- Just past the edge of the zone the bunker comes out of the fog straight ahead. Walk up to the white double doors.
- Unlock the doors with the key (300 XP) and go inside.
What Is Inside The Chemist’s Secure Armory
Inside it is dark. Metal shelves line the first room, and on them lie Durable Gas Masks, which is handy this deep in the radiation zone. Further in are the containers, a Lieutenant crate, two weapons lockers, a chemical storage cabinet and two Caches, the name the game gives a MINA MS41 box and the box by the exit.
Containers
- 2× Cache
- 2× Weapons Locker
- 1× Chemical Storage
- 1× LT Crate
The containers decide the loot. Tap one to see what it can drop in our loot data.
Loot
-
Chemical Reaction Legendary $5,900 LT Crate -
W.M.D. Manifest Epic $5,000 Weapons Locker -
Railgun Sentry Legendary $2,500 LT Crate -
Revive Pistol Legendary $2,500 LT Crate -
Nuclear Program Files Rare $2,000 Loose in the room -
Oris 8.6 Rare $1,900 Weapons Locker -
Ballistic Fabric Epic $1,500 LT Crate -
Durable Gas Mask ×2 Epic $1,000 each Loose in the room -
2-Plate Armor Vest Rare $1,000 Weapons Locker -
PPSh-41 Rare $1,000 LT Crate -
Ballistic Flight Logs Uncommon $1,000 LT Crate -
Infantry Invasion Plans Uncommon $1,000 Weapons Locker -
Regional Combat Notes Uncommon $1,000 Cache -
Weak Night Vision Goggles Uncommon $1,000 LT Crate -
WZ.55 Striga Uncommon $500 Weapons Locker -
Type 73 Common $500 Cache -
Disposable Parachute Rare $300 Weapons Locker - Gas Mask Rare $300 Cache
-
Trophy System Rare $300 Weapons Locker -
Biomaterials Uncommon $200 Loose in the room -
Control Unit Uncommon $200 Weapons Locker -
Reactive Metals Uncommon $200 LT Crate -
Drill Charge Uncommon $100 Weapons Locker -
Screamer Mine Common $50 Weapons Locker -
Shock Stick Common $50 Weapons Locker -
Smoke Grenade Common $50 Loose in the room -
Ammo Pack Common Cache -
Chemicals ×15 Chemical Storage
From one opening in our own run. 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.
The Lieutenant crate is the one that matters. Ours held a Legendary assault rifle worth $5,900, a Railgun Sentry and a Revive Pistol, both Legendary, and a Rare PPSh-41. The two weapons lockers gave an Oris 8.6, a WZ.55 Striga and a W.M.D. Manifest worth $5,000. All in all there was at least $32,050 in loot in the bunker.
Click to enlarge A Durable Gas Mask on the shelves, brightened. 
Click to enlarge The Lieutenant crate, brightened. 
Is The Chemist’s Secure Armory Key Worth It?
Yes, the loot is good. The shelves hold a few Durable Gas Masks, but the real reason to come is the Lieutenant crate, which always has something rare in it, and the two weapons lockers give you another chance at a good weapon. It is a shame the bunker sits in the radiation zone, but a gas mask is all you need to get there, and once you are inside you can grab a fresh one. It is not overpowered, but it is a solid room to loot for rare weapons.
Frequently Asked Questions
Where is The Chemist's Secure Armory in MW4 DMZ?
At the Haneul Nuclear Reactor, grid I4. It is a concrete bunker with white double doors on the northeast side of the reactor compound, a few steps inside the radiation zone.
How do you get The Chemist's Secure Armory key?
Lieutenant The Chemist drops it. He sits in the radiation zone of the reactor, and his key does not drop every time, so it can take a few kills before you get one.
What is inside The Chemist's Secure Armory?
A Lieutenant crate, two weapons lockers, a chemical storage cabinet and two Caches, plus Durable Gas Masks on the shelves. Ours held at least $32,050 in loot. The Lieutenant crate gave a Legendary assault rifle, a Railgun Sentry and a Revive Pistol.
Do you need radiation gear for The Chemist's Secure Armory?
A gas mask is enough to reach the door, since the bunker is just inside the radiation zone. Inside you find fresh gas masks, ours had two Durable Gas Masks on the shelves and a Gas Mask in a Cache.
