A lot of the MOLLE compatable gear that you can get through CDT and Sportsmans Guide are pretty cheesy, I wouldn't trust them, particularly when good gear isn't a lot more expensive.
For what's being described, I might suggest the X-4 or X-6 from SpecOps brand. I've sworn by those pouches for a while now, never at them, and they are fairly in expensive. I also think that SOpB's "speed back" system is probably a bit more rugged than specification MOLLE.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.