The Biotoxin is a Weapon Blueprint available in Call of Duty: Modern Warfare 3 (2022) and Call of Duty: Warzone 2.
It is a blueprint variant of the base weapon M16, one of the Assault Rifles featured in Call of Duty Modern Warfare 3.
The Biotoxin blueprint was released in MW3 and Warzone 2 as part of the Bundle Warning Skin.
You can find all the attachments for the Modern Warfare 3 and Warzone 2 Biotoxin Blueprint listed below.
Here are the attachments for the Biotoxin Blueprint featured in Call of Duty: Modern Warfare 3 and Call of Duty: Warzone 2.
You can build your own Biotoxin weapon Blueprint by adding these attachments on a base in the Gunsmith menu.
To unlock the Biotoxin Blueprint in COD Modern Warfare 3 and Warzone 2 you need to purchase the Bundle Warning Skin from the Store.