If you want to play milsim then look at the milsim facebook pages for inspiration. Lot better for that sort of thing than here.
As for CQB forget looks and go for practical. Minimal is best as speed is your best tool. Never carry anything you don't use and if anything effects your ability to feel hits remove it. CQB is often a lot harder to notice some hits as more noise and faster movement can cover things that woodland doesn't.
CQB is all about the player and 90% of airsofters suck at it so concentrate your efforts on your play not your clothes and you will have a better time.
As for that bag on your other thread just no. I would ask any player to remove something that ridiculous.