Sounds like you have the Baby carbine. Though both carbine barrels were tapered, the Baby had a more extreme taper resulting in a small diameter at the muzzle end. Also, there's a much larger gap between the barrel and mag tube.
Retail was $1995 or about $245 more than a standard carbine with a checkered forend. It was $515 more than a standard carbine with a border checker on the forend.