MOLLE is not about look, it's about functionality. They are worth it. But again, if you're looking for something in CADPAT, your choices are limited, and I personally couldn't find any CADPAT MOLLE stuff.
And that vest will hold 12 M4/M16 mags as it is (2 per pouch). So in theory, you could use one of the mag pouches as a pistol holster, although I personally wouldn't trust that for fear of losing my pistol. I'd rather have it securely locked into a proper holster.
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