Call of Duty: Modern Warfare II (2022)

Modern Warfare II (2022) M13B

Assault RiflesDefeat the Chemist in the Radiation Zone of DMZ and extract his dropped weaponTakes camo
Assault RiflesM13B — Call of Duty: Modern Warfare II (2022) weapon render

How do you unlock the M13B?

The M13B is in the Assault Rifles roster for Modern Warfare II (2022). Defeat the Chemist in the Radiation Zone of DMZ and extract his dropped weapon. Its base challenge set includes Tarnished, Field Ops, Projectile, Ice Cave.

UnlockDefeat the Chemist in the Radiation Zone of DMZ and extract his dropped weapon
AvailabilityOriginal Season 1 access documented; expired Battle Pass and event routes are not claimed to be active today.
Takes camoYes

Reviewed September 18, 2026. Compiled from official progression/reward announcements and public weapon/camo references on September 18, 2026. Reference tables were cross-checked where available. Not verified in a live game; expired events and Battle Pass routes are identified as historical.

Sources: Call of Duty — MWII launch progression and mastery · Emil Carlsson — Orion challenge reference (MIT) · Call of Duty Wiki — MWII camo catalogue · GamesAtlas — MWII weapon access catalogue · Activision Support — Season 06 rewards · WZHUB — independent MWII challenge comparison

Weapon sources: GamesAtlas — M13B · Emil Carlsson — Orion challenge reference (MIT) · Call of Duty — MWII launch progression and mastery

How does the M13B play in Modern Warfare II (2022)?

RoleAssault Rifle
Challenge noteGold: 3 kills without dying, repeated 10 times. Platinum: 25 longshot kills. Polyatomic: 25 headshot kills.
Progression tipThe M13B has 4 base camo challenges. Finish its base set to open Gold. The Assault Rifles Platinum gate requires 8 Gold weapons in that class, counting eligible later additions. After 51 Platinum weapons, complete this weapon’s Polyatomic challenge. Orion needs 51 Polyatomic weapons; it is then awarded on each weapon with Polyatomic.
Camo tipEarn weapon XP until the challenge is open, then use the named weapon for the required eliminations.

M13B — Multiplayer camo challenges

Tarnished Reach weapon level 2 on the M13B, then complete 50 kills with it.
Field Ops Reach weapon level 9 on the M13B, then complete 10 double kills with it.
Projectile Reach weapon level 15 on the M13B, then complete 15 point-blank kills with it.
Ice Cave Reach weapon level 19 on the M13B, then complete 15 kills from behind with it.

Every camo, exact unlocks — see the full Modern Warfare II (2022) camo directory.

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M13B — common questions

How do you unlock the M13B in Modern Warfare II (2022)?

Original Season 1 access — M13B: Defeat the Chemist in the Radiation Zone of DMZ and extract his dropped weapon Original Season 1 access documented; expired Battle Pass and event routes are not claimed to be active today.

How do you unlock camos on the M13B?

The M13B has 4 base camo challenges. Finish its base set to open Gold. The Assault Rifles Platinum gate requires 8 Gold weapons in that class, counting eligible later additions. After 51 Platinum weapons, complete this weapon’s Polyatomic challenge. Orion needs 51 Polyatomic weapons; it is then awarded on each weapon with Polyatomic.

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