Beez Combat Systems (BCS) has a new AK47 specific chest rig available called the AK47 Low Profile Chest Rig. It features the ability to carry 5 AK47 magazines, a generous 14 column by 4 row field of MOLLE webbing, shock-cord pull-tab retention, and a large internal pouch for carrying various items. The included H-harness helps distribute the weight of 5 AK mags.
I really like the design of this rig. AK mags seem to work better in odd numbers when they are carried across your chest. The closer they are to your center line, the easier it is to deal with the curve and length of the magazine when drawing it from the pouch. I usually find the center 3 magazine pouches are easiest to reach. If I were running this rig, I would use the outer 2 mag pouches to feed the inner 3 when I was rotating ammo.
Steel AK magazines are somewhat heavy and can be very bulky when stacked on top of one another. This rig allows the shooter to carry 5 magazines without the need for stacked magazine pouches. This makes it about as low profile as you will find in an AK specific chest rig.
BCS tells me that they purposely designed this rig with very deep magazine pouches to better support the weight of the magazine. I would prefer a slightly shallower pouch for two reasons. The first is so that more of the magazine is exposed for gripping during reloads and secondly to allow the use of 20 round magazines. BCS is a custom shop, so they assure me that these modifications will be no problem. There are definitely perks to dealing with custom shops like BCS.
Even if the pouches were made shorter, there would still be plenty of room for mounting a blow out kit and some pistol mags. The large MOLLE field on the front of this chest rig should give you plenty of options for mounting additional pouches. Just be sure to resist the temptation to use every last inch of real estate.
It is great to see this kind of well thought out AK specific support gear coming to market as the AK itself continues to adapt and evolve.