It would be far simpler, and actually weigh less, to just drop all of that molle crap into a nice large pannier and pull it out when you go pedestrian. I usually put a briefcase in one pannier, and a small, light day bag in the other when commuting.

You can probably deduce that I am not a molle fan - IMHO, it is unnecessarily heavy and cumbersome, of little use outside a battlefield, where I will grant it may have utility....