i mean those rectangular looking things on their helmets. im pretty sure every class only has one of these and the assaulter class having them at the top instead at the back like the other classes but in the thumbnail the support class and in think the marksman trooper have two of these ir strobes (MS-2000 (M2)) both at the top as well as at the back.

@Mccall, that's just the vanilla Support class. Not sure what you mean by IR strobes, I disabled all mods except for the NVG filter when I took the thumbnail.

what mod is that in the thumbnail? the support trooper has 2 ir strobes and it looks like the second one is used as a battery pack/counterweight

Good mod. They are realistic enough for me and they are bright af.

Thank you for this actually! I struggled with the same problem of visibility. My eyesight is very poor.