IMHO if one wants a gun, rifle or shotgun, with two fitted barrels, and does not possess the skills to fit the barrels themselves, one should buy a gun that already has such. Paying for first class work to have another barrel fitted is prohibitive, and honestly, it's hard to find craftsmen that truly have the ability. I have been badly disappointed in this by gunsmiths whose abilities did not match their reputations.

May God bless America and those who defend her.