I remember about 2 years ago at the Southren they had on display a grade 2 16 ga that also had a second set of barrels that were 20 ga. Both sets were perfectly fitted to the gun and it was really a very unique gun and a combination that anyone would dream of owning. I asked if it he owner would considering selling it or possibly selling it and I was told no not at any price. I was told it belonged to a collector they said he called himself the Philly fox, and he has a collection of some very rare and unique guns. I'd love to have been able to buy that gun!