OnyxxReaper

So i got this mod and everything looks great, plus a huge selection of things to use. I want to use this for coop multiplayer and my game lets me wear it along with the ghost recon mask from the hidden identities pack and i look awesome on my screen, but apparently on everyone elses screen im just in my underwear. am i not supposed to use unit mods in multiplayer or is it just depending on the server. there are some servers i cant join with any mods, but for the ones that i can join i assume they allow mods since i can join, but this problem seems to happen anyway. if it is just the server, does anyone know any servers that definitely allow this mod to show up