Comms Modules are one of the more elusive ingredients in Call of Duty: Modern Warfare 4 DMZ, and skipping them is not an option if you want to unlock high-value upgrades and craft some of the mode's most useful field tools. The drop rate is low enough that a single careless run can leave you empty-handed, so knowing exactly where to look and how to maximize your odds makes a real difference.
Where do Comms Modules spawn in MW4 DMZ?
Comms Modules drop from two types of interactable objects: desktop PCs and server racks. Both are found in data centers and tech-heavy buildings. There are three confirmed spawn zones across Hajin's Exclusion Zone, each with a different threat level and a different density of lootable objects.
Deadtown (east riverbank buildings)
The cluster of buildings east of Deadtown, along the riverbank, is the most accessible option. The computers are on the top floors of several buildings in this area, and the threat level is low compared to the other two locations. For players who are still building out their loadout or who want a lower-risk grind, this is the place to start. The density of desktop PCs here means more rolls per run, even if the drop rate itself does not increase.
Cheonwang Peak Array
Cheonwang Peak Array is the standout location for farming. The Data Farm on the fourth floor of the long rectangular building contains several rows of server racks, giving you the highest concentration of lootable objects in one room. The threat level is elevated compared to Deadtown, so expect tougher enemies, but the sheer number of servers makes each run more efficient. This is the spot most players should prioritize once they have a solid loadout.
The Grid (Netshin Tech Complex)
The Netshin Tech Complex inside The Grid has a server room on the 14th floor that can be looted for Comms Modules. The higher threat level does push drop odds up, but The Grid carries a Critical threat rating, making it the hardest area in this list by a significant margin. The complex is also the main location for the Operation Grid Assault Story Mission and is home to one of Hajin's most dangerous lieutenants, Jang-Ui. Unless you are running a coordinated squad and already comfortable with the zone, the risk-to-reward here does not beat Cheonwang Peak Array for a standard farming run. You can read more about the commanders and lieutenants you'll encounter in the DMZ boss locations and tactics guide.
Netshin Tech Complex server room
Comms Module location comparison
| Location | Floor | Object Type | Threat Level | Best For |
|---|---|---|---|---|
| Deadtown (east buildings) | Top floors | Desktop PCs | Low | Early-game farming |
| Cheonwang Peak Array | 4th floor | Server racks | Elevated | Most efficient grind |
| Netshin Tech Complex (The Grid) | 14th floor | Server racks | Critical | High-risk, high-reward |
What is the fastest way to farm Comms Modules?
Looting is the floor, not the ceiling. The fastest method once you have the resources is to craft Comms Modules directly at your 3D Printer. Each craft costs 100x Electronics and 3x CPUs. The catch is that you need to unlock the Epic Ingredient Printing upgrade first, which requires $100,000, 10x Binding Catalysts, 10x Printed Circuit Boards, and 5x Military Composites. That is a meaningful investment, but once it is done, you can produce Comms Modules on demand rather than relying on chance drops.
For players who have not reached that upgrade yet, running Cheonwang Peak Array repeatedly and securing modules in a Backpack's Secure slot is the most reliable manual approach.
3D Printer upgrade menu
What recipes use Comms Modules?
Comms Modules feed into four separate recipes, covering both FOB upgrades and field equipment. Here is the full breakdown:
- Uncommon Ingredient Printing upgrade: requires Comms Modules (exact count tied to the upgrade unlock)
- Stash Weapon Upgrade I: $50,000 + 7x Reactive Metals + 10x Stock Rods + 5x Comms Modules
- Advanced UAV: 2x Comms Modules + 3x Nitro Compounds + 5x Electronic Sensors
- Fulton Drop Marker: 1x Prototype RF Module + 3x Comms Modules + 5x Control Units
The Advanced UAV and Fulton Drop Marker are both strong field tools that pay off in active runs, while the Stash Weapon Upgrade I expands your long-term loadout options. Prioritize based on your current playstyle, but the Stash Weapon Upgrade is worth targeting early since it has a direct impact on how you enter every subsequent run.
Quick tips before you run
- Hit Cheonwang Peak Array first. The fourth-floor Data Farm has the best density of server racks outside of a Critical-threat zone.
- Always use a Backpack with a Secure slot to protect modules from a failed exfil.
- If you are grinding for the Stash Weapon Upgrade I, you need 5 modules, so plan for multiple runs unless you get lucky.
- The Epic Ingredient Printing craft is the long-term solution. Start saving Electronics and CPUs alongside your Comms Module hunts so you can transition to crafting as soon as the upgrade is affordable.
- Avoid The Grid until you are confident in your squad's ability to handle a Critical threat zone and the Jang-Ui encounter.
For more on navigating Hajin's Exclusion Zone and making the most of every run, the full MW4 DMZ strategy guides collection covers everything from key locations to story mission rewards.
