HIgh Speed Gear Inc makes something similar but it is much bigger. Personnally, I dont like things hanging in front of me, unless I am going to be convoying for a long time. If you have to move, those zippers wont close up quick enough to prevent loss of items in the fold over compartment.

The one from high speed gear inc is called the warlord, and it is a stand alone piece designed to go over your chest or body armor.

Garrett
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On occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. - Epictetus