Call of Duty: Modern Warfare II (2022)

Modern Warfare II (2022) STB 556

Assault RiflesUnlocked at Level 41Takes camo
Assault RiflesSTB 556 — Call of Duty: Modern Warfare II (2022) weapon render

How do you unlock the STB 556?

The STB 556 is in the Assault Rifles roster for Modern Warfare II (2022). Reach Level 41 in Military Ranks. Its base challenge set includes Sponge Tac, Black Top, Slate, Neon Pink.

UnlockLevel 41
AvailabilityOriginal MWII Multiplayer rank or weapon-platform progression; check the named weapon’s unlock panel.
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 — STB 556 · Emil Carlsson — Orion challenge reference (MIT) · Call of Duty — MWII launch progression and mastery · Pro Game Guides — launch weapon unlock comparison

How does the STB 556 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 STB 556 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.

STB 556 — Multiplayer camo challenges

Sponge Tac Reach weapon level 2 on the STB 556, then complete 50 kills with it.
Black Top Reach weapon level 8 on the STB 556, then complete 20 mounted kills with it.
Slate Reach weapon level 14 on the STB 556, then complete 10 double kills with it.
Neon Pink Reach weapon level 20 on the STB 556, then complete 30 kills while crouched with it.

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

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STB 556 — common questions

How do you unlock the STB 556 in Modern Warfare II (2022)?

STB 556: Reach Level 41 in Military Ranks. Original MWII Multiplayer rank or weapon-platform progression; check the named weapon’s unlock panel.

How do you unlock camos on the STB 556?

The STB 556 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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