After buying and running multiple belts for many years, I have found the very best mini war belt is the Ronin. I'd put 2 pistol mag carriers carriers (Esstac KWYI) as far forward left as possible on the belt, followed by 2 Emdom universal rifle mag carriers in the next molle slots. They can run 2 mags in one pouch, allow you to draw one, while retaining the other, though you'd never run it like that normally. You can easily run a handgun on the other side, and will want to for weight balance. The only choice for a holster, other than custom Kydex for an odd gun, is Safariland, preferably an ALS locking variety. My use for the belt is a fast donning belt, used with a plate carrier, working as a police Detective, for active shooter, warrant service, raids, etc. So fast to put on, comfortable for long periods, and able to be worn in a vehicle comfortably were most important points for my use.
I have spent so much on tactical gear and own so many belts, pouches, and holsters I forget everything I have sometimes. My suggestion is to buy the good stuff once and don't mess around trying lots of cheap or sub optimal stuff like me. Unless you want multiple hand out war belts for friends covered with sub optimal gea
For example, I have 1.5" Volund G-hook belts, 1.75" Volund G-hook belt, and 2" Volund micro war belt. That's just the Volund stuff. That G-hook is better suited for concealed carry. The wider is better for the role you are considering, but won't fit all pants loops. It's also a bit stiffer and less comfortable. It's not the best minuteman/tactical/class belt for supporting a rifle, pistol, IFAK, flashlight, etc. Putting it through belt loops with pouches and a holster is gonna take 10 minutes, lol threading each belt loop, then through a pouch, then another loop, etc... just shoot me now so I don't go through that every again. For normal wear I have a 5.11 Maverick Assaulters belt I use with a paddle OWB Safariland ALS holster, paddle pistol mag carriers, and other slip on carriers for flashlight, radio, etc. But that stuff is not ideal for rifle and IFAK support. It just makes getting dressed easier.
Personally, I think that ATS war belt is way too big and bulky. It's a small, full sized war belt with 3 molle slots. I think people run those only out of ignorance or lack of experience with mini/micro war belts, which use a half slot over and under a full negative slot.