Birddog, about 4 years ago, I rescued an old, beat up Hawg rifle...no lock, the stock fell from the bbl when I picked it up. The bbl on that was 46".
The gun was too beat up for any restoration, but I was able to salvage the handmade brass (I thought it was iron when I bought the wreck), and I passed the bbl, the remains of the stock, and the hand made double trigger to a skilled gunsmith buddy of mine...he figures to copy the stock at some point, and to freshen the bbl and reuse it. I don't know his plans for the triggers, but he's a buddy of Jim Chambers and maybe something of the old triggers will turn up in a Chambers product.
I ran the gun past a collection of experts, some of whom probably knew what they were talking about. The consensus was that it was an assembly of surviving parts from at least two older guns, and had been converted from flint to cap...someone gave me a date of 1800, another said "pre-revolutionary"..given the cal of .40, my bet is on the 1800 guess. It started life as a full stock, and a rib had been added when the full stock broke off and was trimmed back..
I suspect it was an ungainly mule of a gun to shoot, and were I you,I'd make the bbl a lot shorter...Best, Hank