Can't really answer that. Different rigs for different applications. There are plenty of images online. but looks like pretty standard is a butt pack, canteen, two ammo pouches and a bandage pouch. Some rigs have two canteens, add a shovel, etc.
It's been a long time but mine in service if I remember correctly was a butt pack, two ammo pouches, canteen, shovel, bandage pouch and a compass. I was in a service company, ordnance, not infantry.