The Mortal's Bane 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 M4, one of the Assault Rifles featured in Call of Duty Modern Warfare 3.
You can find all the attachments for the Modern Warfare 3 and Warzone 2 Mortal's Bane Blueprint listed below.
Here are the attachments for the Mortal's Bane Blueprint featured in Call of Duty: Modern Warfare 3 and Call of Duty: Warzone 2.
You can build your own Mortal's Bane weapon Blueprint by adding these attachments on a base in the Gunsmith menu.
To unlock the Mortal's Bane Blueprint in COD Modern Warfare 3 and Warzone 2 you need to reach Victory Sector of the Season 1 Battle Pass (Complete the Pass).