RHS for modern gear for Rusfor/NATO/Rebels/Serbs etc.
Furthermore there's a shitton of mods that use these mods for basic gear for factions along with building on them with more mods like ACE,CBA, Task Force, Enhanced Movements and many, many more.
If you've got questions u can probs find me easily on Steam but I've played a bit of Arma 3, only 1k hours or so though so I'm not that experienced but I do know most of my shit related to Milsim groups.