Muzzle Before Flesh
Operators stay in Low Ready when behind a teammate. More specifically, this mod reduces the over-the-shoulder shooting threshold to 0.2 meters.
Not recommended for shield formations, since the second operator must move out from behind the shield to engage targets.
Note: In CQB terms, ‘Muzzle Before Flesh’ means your muzzle should always clear your teammate before shooting (if I were to define it in my own terms — no shooting if you can see your buddy in front of you). But in-game, this mod doesn’t strictly enforce that, and I have no idea how to implement this at the current version of the game. I just thought it had a nice ring to it and captured the idea, even if the behavior isn’t fully supported yet.