MW4 DMZ Gunsmith and Weapon Manuals explained

In this article

1. Weapon Manuals are the key
2. The launch arsenal
3. Slots, attachments and Apex
4. What things cost
5. Where weapons come from
6. How to build for DMZ
7. Gunny and quality of life
8. A practical weapon routine

DMZ's Gunsmith is a shop, not a menu. In multiplayer you unlock an attachment and attach it. In DMZ you unlock the attachment through weapon levelling, then pay DMZ Cash to buy the slot and the attachment, then carry the resulting weapon into a deployment where it can be lost. The system is deliberately more expensive, because a weapon you built is part of the run's risk.

The Gunsmith unlocks at DMZ level 10. Until then, your weapons come from the free loadout, the Vendor, enemies, containers and other players.

Weapon Manuals are the key

Any weapon you extract with can be brought to the Gunsmith and upgraded as a single instance. But to purchase that weapon type permanently — to build it again after it is lost — you must find its Weapon Manual in Hajin and extract with it. A manual is consumed at exfil, unlocks the weapon in the Gunsmith and pays 5,000 DMZ Cash.

This is the most important sentence in the system: extracting with a weapon does not unlock it for purchase. Only the manual does. If you lose a weapon you extracted but never unlocked, the weapon type remains locked.

The launch arsenal

The official guide lists 32 launch weapons across eight categories: eight assault rifles, five SMGs, two shotguns, three LMGs, three marksman rifles, three sniper rifles, four pistols and four launchers. Launchers do not use attachments or Apex attachments, so they are utility rather than build projects.

Slots, attachments and Apex

Gunsmith-built weapons take up to five attachments. Weapons found in Hajin can have up to eight attachment slots, which makes a good looted weapon worth extracting even if you already own the base type. Each Gunsmith slot must be purchased with DMZ Cash, and each successive slot costs more. The attachment itself must already be unlocked through weapon levelling, which is shared between multiplayer and DMZ.

The Apex attachment slot is the exception: it is available without a cash payment once the weapon is levelled enough to access it. Cosmetics — camos, charms, decals and stickers — cost nothing to apply. Blueprints are the exception and are purchased at a discount compared with building the same weapon from scratch.

What things cost

Activision's example is a base M4 assault rifle at around 5,000 DMZ Cash, before attachment slots. That is a useful anchor: a single fully built weapon can cost more than a stash upgrade, and it can be lost in one bad deployment. The Gunsmith discount, unlocked through the 3D Printer upgrades, reduces future purchase prices and is worth prioritising if you rebuild often.

Where weapons come from

• The free loadout when you deploy.
• Weapons stored in your stash.
• Gunsmith purchases.
• The FOB Vendor, which rotates stock daily.
• Enemies and Lieutenants during a deployment.
• Slain players.
• Military containers in police stations and compounds.
• Weapon Blueprints.

The free loadout exists precisely so that a player with an empty stash can still deploy. Use it when you are rebuilding, and save the built weapon for a run where you have a specific objective.

How to build for DMZ

DMZ fights happen at unpredictable ranges and often start with AI rather than players. That pushes builds towards flexibility rather than a single duel range: an optic you can actually see through, a suppressor if you plan to stay unnoticed, and a magazine size that lets you finish a squad of AI without a reload. The Gunsmith's five slots are a budget, so decide what the weapon is for before spending.

Do not copy a multiplayer meta build without checking it. Multiplayer values sprint-to-fire and close-range TTK; DMZ values noise, ammo endurance and the ability to fight at 30 to 80 metres as well as indoors. A build that wins a ranked match can be the wrong tool for a Hajin extraction.

Gunny and quality of life

If you do not want to build manually, Gunny can assemble a functional build for you. It is a reasonable starting point for a replacement weapon, and it saves time when you are deploying with friends. The Firing Range at the FOB lets you test the result at distances from under 10 metres to over 100 before you risk it.

A practical weapon routine

1. Extract every Weapon Manual you find, even for weapons you do not use yet.
2. Keep one reliable built weapon in the stash; carry the free loadout on low-stakes runs.
3. Buy attachment slots on the weapon you actually use, not across five weapons.
4. Test the build at the Firing Range before deploying.
5. Unlock the Gunsmith discount before buying a second or third weapon type.

The DMZ arsenal is a long-term collection, not a loadout screen. The players who always have a good weapon are the ones who treated manuals as loot worth more than cash.

Further reading

Sources & further reading

• Call of Duty — DMZ Deep Dive, Part 2: Forward Operating Base full intel guide ↗
• Call of Duty — Modern Warfare 4 DMZ deep dive ↗

References reviewed 30 Oct 2026 AEST.

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