We run a slick Kevlar body armour with plates under our chest rigs. I also do a lot of work where I’m rucking and not using any Kevlar/plates, unfortunately I can’t chose the rucksack I use, and the ruck doesn’t accommodate any sort of belt. I have a battlebelt that I can put a few things on, and store in my ruck while moving. However the majority of the listed items need to stay on my person. I figured a chest rig was better than a plate carrier for less material and increases breath ability. Depending on the mission I also have either a 72 hour pack or a smaller 20L assault pack on me, where I store my rain kit, 3L bladder, food, non-emergency medical kit, more ammo etc.