MW4 DMZ Weapons Mod Workshop Key

The MW4 DMZ Weapons Mod Workshop key opens the weapons workshop upstairs in the military repair garage at Chang-san Air Base, west of the clinic, in Chang-san Air Base. Confirmed 3 November 2026 from 2 independent sources.

Grid	B5 (both sources)
Door	The weapons workshop upstairs in the military repair garage at Chang-san Air Base, west of the clinic
Where it dropped	Random loot (Dexerto).
Inside	Not reported in detail.
Status	Third-party, two sources agree, 3 November 2026

Chang-san Air Base on our schematic of Hajin, with the grid from the key’s description outlined. Our grid overlay is approximate. Open Chang-san Air Base on the interactive map.

What we know about the Weapons Mod Workshop

Rarity: Rare (both sources).

How to reach it

Read the grid on the key’s own description first, then type it into the MW4 DMZ map grid search. Our grid overlay is still approximate, so use it to get to the right part of Chang-san Air Base and then look for the building named above. The Chang-san Air Base page lists its threat levels and named zones.

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Next in MW4 DMZ

See Chang-san Air Base on the MW4 DMZ map
Mission in the same area: Operation Iron Citadel
Key in the same area: Field Depot
Key in the same area: Commandant Office
Key in the same area: Air Base Access Card - Multi Use
Another key: Netshin IT Room
Another key: Prison Encampment Storage
Browse MW4 DMZ keys by area

Sources: Dexerto MW4 wiki: Weapons Mod Workshop (third party), DMZ Codex: Weapons Mod Workshop (third party). Back to all MW4 DMZ keys.

MW4 DMZ Weapons Mod Workshop Key

What we know about the Weapons Mod Workshop

How to reach it

Next in MW4 DMZ

Weapons Mod Workshop key questions

Where is the Weapons Mod Workshop door in MW4 DMZ?

Where does the Weapons Mod Workshop key drop?

What is inside the Weapons Mod Workshop?