Call of Duty: Modern Warfare and Warzone have been updated to version 1.44 today by Raven Software. You can find the complete patch notes below.
This update has adjusted various weapons. The weapons that have been tweaked include Assault Rifles like Grav and more. Get the details on what is included in this update below, or have a look at the patch notes on the official website.
Modern Warfare Update 1.44 and Warzone Patch Notes
General
Weapons