my belt rig is a minimal rig I run with my vest. If it gets too hot or I need to go super light weight, I can dump my chestrig and just run the belt... it has my pistol, 3 pistol mags and 2 rifle mags on it. For a lot of milsims that can hold out a reasonable amount of time, though nightfall was cool enough this year I didn't have to resort to it.
I ended up doing that for a skirmish this past weekend, running a drum and 2 mids.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.