The Bruen Bullpup Platform is one of the Weapons Platforms available in Call of Duty: Modern Warfare 2 (2022) and Warzone 2.
The STB 556 is the first weapon unlocked in the Bruen Bullpup Platform in Modern Warfare 2, shown within the in-game Gunsmith as the first weapon Receiver.
Here you can find all the base weapons included in the Bruen Bullpup Platform and how to unlock them.
Weapon Platform Info
- First Receiver
STB 556 - Release Game Launch
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All Bruen Bullpup Platform Unlockable Weapons Receivers in MW2:
Here are all the Modern Warfare II and Warzone 2 base weapons that you can unlock and level up in the Bruen Bullpup Platform:
How To Unlock Weapons in the MW2 Bruen Bullpup Platform:
Here are the instructions on how to unlock all weapons in the Bruen Bullpup Platform of Warzone 2 and MW2:
- STB 556: Reach Level 41 in Military Ranks
- MX9 (AUG): Reach Level 13 with the STB 556
- HCR 56: Reach Level 20 with the STB 556
Bruen Bullpup Platform Progression Tree Map:
Here's the progression tree for the Bruen Bullpup Platform in Modern Warfare 2 and Warzone 2: