[Ibby]

One setup I have has a smallish CP Gear Alamar chest rig that holds 6 mags. I also have a ready mag on my M4, so that's 8 mags total. Pretty good setup and you don't wind up looking like the Michelin Tire man.
Another setup I have is a chest rig and cummerbund that can carry 28 mags. That's a lot of weight and encumberance, and almost never needed, even during a 24 hour milsim.
I just picked up an SO Tech chest rig that seems much more comfy than the Alamar, and holds a few more mags. Haven't tried it out yet, but the design and distribution of load seem exactly what I've been looking for.
I also rigged up a quick change box mag system for my 249. It's actually faster to change box mags on the airsoft one that it is to change real mags on the real one. Pretty cool. And the mod for 3000 rounds per box is a nice added touch. Now I just need a game day that will allow all that.