I'm held up on my gear and accessories by holster weights. I might have to SWAG it, or find a scale and round up my holsters. Maybe there's a military gear forum with that data. I know .gov has one, but you need clearance to visit this shipping weight site.
This link gives the weights of the holsters that they sell (I only checked three, different production companies). The site doesn't have a master list of weights though, you'll have to click each holster to get the weight.