IDK why it’s not a more popular headcanon that Mccree didn’t just lose his arm in whatever explosion/calamity he went through, but also a significant chunk of his torso
I would imagine that whatever it was would have definitely taken out most of that side of his body, and even if it didn’t they would have had to do some serious work to create a working structure that supported the weight of his arm on his torso
I’ve also considered that those gigantic tubes wired into his stomach are just some fancy cooling system, but I also genuinely think it’s more likely Mccree’s got quite the injury that’s more than just a missing limb. He might even have some artificial/biomechanical organs under all that plating.
Not to mention his torso kinda sorta resembles Zenyatta’s
As well as Genji’s
So I do pretty much believe that the setup on Mccree’s torso isn’t just armor plating you can take off, especially since there’s no discernible reason a chest plate should glow like that unless it’s got some mechanisms running under there