See a used one for sale here .

This was an effort to offer a low price point double rifle.
The adjustable feature and the shotgun chambering were apparantly pitches to hunters in shotgun-only hunt states. They were built to run sabot ammunition.

Seems good for the intended market, but didn't sell well enough for the maker to keep it up.

BTW -- not Connecticut Valley (CVA) as in the black powder replica rifle makers, but Tony Galazan's CSMC or Connecticut Shotgun Manufacturing Company.