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GuideConfirmed

MW4 DMZ Power Regulator

Quick Answer

Power Regulators are random Epic loot reported at Haneul Nuclear Reactor; no container guarantees one.

With Epic Ingredient Printing available, the reported recipe uses 100 Electronics and 3 Printed Circuit Boards.

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Search the Haneul Nuclear Reactor for Power Regulators, especially red containers in its ruined buildings and reactor areas. A regulator is randomized Epic loot; no single chest is a guaranteed spawn. If your FOB has Epic Ingredient Printing, you can instead craft one with 100 Electronics and 3 Printed Circuit Boards.

The reactor route trades crafting cost for radiation and combat risk. The printer route removes that deployment search, but its upgrade cost makes it a later progression option.

Reactor search and preparation

The GamesRadar location guide identifies Haneul Nuclear Reactor as the author's most productive search area. It also states that regulators can appear in other containers and that a run can produce none. Treat the red containers as a useful priority, not a special guaranteed reward.

Hajin map highlighting the Haneul Nuclear Reactor search area

Reactor search area shown in the GamesRadar guide. Screenshot: Activision, via GamesRadar.

Before entering, prepare for both armored enemies and radiation. A hazmat suit, gas mask, and radiation blockers are recommended equipment for this search; they are not interchangeable promises of unlimited protection. Plan how you will leave before going deeper into the plant.

  1. Approach the reactor with enough equipment to handle its threat level.
  2. Check ruined buildings and reactor interiors, prioritizing red containers while checking other loot along the route.
  3. Confirm the item name is Power Regulator and store it for extraction.
  4. Leave before protection or supplies run too low. An empty search is a reason to extract or change objectives, not proof that you missed a required hidden trigger.

The recorded reactor loot route also shows regulators while searching the plant and recommends radiation protection. Its claims about how long a suit lasts are individual observations, so do not base your escape timing on a fixed duration from that recording.

Printing a Power Regulator

The reported costs below come from GamesRadar’s October 2026 crafting guide. Check the current FOB menu before paying: the upgrade is a separate purchase from each subsequent regulator.

PurchaseReported requirementsResult
Epic Ingredient Printing upgrade100,000 DMZ Cash, 10 Binding Catalysts, 10 Printed Circuit Boards, 5 Military CompositesEnables printing Epic ingredients
One Power Regulator100 Electronics, 3 Printed Circuit BoardsProduces one regulator once the needed printer capability is available
Epic Ingredient Printing upgrade requirements in the DMZ printer

Epic Ingredient Printing upgrade requirements, distinct from each individual regulator recipe. Screenshot: Activision, via GamesRadar.

The official FOB guide confirms the broader system: printer upgrades allow ingredient production using resources and other ingredients. It does not independently list the regulator costs above. The crafting menu is the final check for your account's unlocked recipes and available materials.

Choosing the cheaper route for your situation

Loot first if you need only a small number, are already deploying near the reactor, and have the protection to make the search worthwhile. You retain the chance of finding other useful equipment, but you also risk your loadout and may return without a regulator.

Invest in printing if you repeatedly need Epic ingredients and can afford the upgrade without sacrificing essential deployment gear. The upgrade does not make regulators free: every print still consumes Electronics and Printed Circuit Boards.

Check the item you are trying to build before consuming a regulator elsewhere. GamesRadar associates regulators with advanced equipment including night vision and railgun sentries, but the required quantity depends on the actual recipe. Track that recipe in the printer instead of assuming one regulator completes every advanced item.