The Undertow 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 Vaznev-9K, one of the SMGs featured in Call of Duty Modern Warfare 3.
The Undertow blueprint was released in MW3 and Warzone 2 as part of the Bundle Fringe Tactical.
You can find all the attachments for the Modern Warfare 3 and Warzone 2 Undertow Blueprint listed below.
Here are the attachments for the Undertow Blueprint featured in Call of Duty: Modern Warfare 3 and Call of Duty: Warzone 2.
You can build your own Undertow weapon Blueprint by adding these attachments on a base in the Gunsmith menu.
To unlock the Undertow Blueprint in COD Modern Warfare 3 and Warzone 2 you need to purchase the Bundle Fringe Tactical from the Store.