.......I'm on console. I stopped building PCs when I bought a PS3.
I used to love the Operation Flashpoint series which were the precursor to the ARMA games. If I were still gaming on PC, I'd certainly be looking at games like SQUAD, ARMA 3, Escape from Tarkov, Insurgency, Hell Let Loose, etc.
PS3 had a few good tactical shooters like a couple of the Flashpoint games that were ported, MAG and a couple others, but PS4 has been lacking. Ghost Recon Wildlands helped scratch that itch with it's lethal gameplay but still fell a little short although still quite fun in it's own right.
We finally got DayZ a little while back (which started out as na ARMA mod) but unfortunately it's still buggy as hell. ....still, it's essentially ARMA combat which is cool but it's about as hardcore survival/milsim as you want to get (e.g. having to manually refill your magazines, clean your weapons, maintain food & water intake, etc.).
Some think the new gen consoles will be the gateway to new tac shooters coming on board and I think they are right.