The carved gun that the factory records show as sold to KING THE WOOD CARVER has a 24" half&half with no rear dovetail and that gun is 14XXX also if you look at page 3-17 in Murry for the 1899C
under barrel it list 26 octagon only for the model C if you can make them longer up to 30" why not shorter to 20"??? On 22's we have seen them longer than that!!!