I've got a regular fat boy and I'd say you could not use it as a waist pack. The strap just won't do it. For a waist pack you could try the devil dog or the thermite. I have a tube sheath attached to mine and I tired out an M2 on it but I never used it so I took it off. I'd like to get a rolly polly to hold a water bottle. The tube sheath is attached over the shoulder strap above the cell phone pouch and I tried the M2 on the other side of the strap at the lower attachment it was fine but i never used it so i took it off.

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Adam