Bruen Bullpup Platform

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