One that was teased in the build-up was the weapon inspect feature - which allows you to get a closer look at your weapon!
Here's how to inspect your weapon.
How To Inspect Your Weapon In Modern Warfare And Warzone
To inspect your weapon all you need to do is hold the left button on your D-pad.
This will prompt your player to look at both sides of the weapon you are currently holding.
This feature works for every weapon in the game.