Best guns are typically bespoke guns, or are at least available as bespoke guns. and they are usually available with different levels of adornment. Most best guns are decorated with engraving, fine line hand checkering, etc. A best gun is intended to be competitive with the best that any other shop can build. One of those few shotguns intended to compete in the marketplace primarily on the basis of quality, design, workmanship and finish rather than just price.
Let's start by reviewing the definition of 'best gun': As used here, best gun means a double-barreled shotgun of the highest quality.