The Basileus 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 Victus XMR, one of the Sniper Rifles featured in Call of Duty Modern Warfare 3.
You can find all the attachments for the Modern Warfare 3 and Warzone 2 Basileus Blueprint listed below.
Here are the attachments for the Basileus Blueprint featured in Call of Duty: Modern Warfare 3 and Call of Duty: Warzone 2.
You can build your own Basileus weapon Blueprint by adding these attachments on a base in the Gunsmith menu.
To unlock the Basileus Blueprint in COD Modern Warfare 3 and Warzone 2 you need to reach Sector A15 of the Season 1 Battle Pass.