lots of good points have already been touched on in this thread. Id like to point out another one.
Alot of players wear too much gear. Theyre running around with 20lbs of stuff that they dont need to be wearing all the time, and are worn out too early.
Gear down, last longer. Every oz adds up.
I've got a couple of plate carriers that I love the look of, but I know I can stretch my endurance with a RRV instead. When Im building my gun, I go as light as possible for the same reason.