Miller - that is exactly where I was going. I have a set of 20ga Flues barrels all alone in my shop. I was wondering if there was enough consistency in the Flues bar and standing breech to allow for a set of 20 gauge barrels to fit on a 16 ga frame. Always trying to find a home for a lost set of barrels and was not sure if I would have a larger chance by also including a 16 ga gun in that search too. I would think a 16/20 set would be nice to have.