Federal law requires that the barrel be no less than 18" long as measured from the front of the chamber (at the forcing cone).
A Fox shotgun double barrel B-SE Series H is valued at $599 in good condition. It has a 26 inch barrel and a 2 3.4 inch chamber.
2-6 USD or so
From a book: THE SHOT GUN & ITS USES By "East Sussex" (First published in London in 1914.) says on page 2: "About 1800, however, the double-barrel shot gun was taken up, if not introduced, by Joe Manton..."
Up to 200
The Lovinsior Herstal double barrel shotgun, serial number P1K329,Êhas a 2 3/4 inch barrel.Ê It was made between 1952 and 1960.
It is likely a 12 gauge, but take it to a gunmith to have it checked.
NO. 3 1/2 shells are fairly new and only to be shot through rifles rated for it. If it doesn't say it on the barrel, DON'T DO IT!
first you will need a 2 barrel carby. then you will need either a new inlet manifold for a 2 barrel, or an adaptor plate that goes from 4 barrel to 2 barrel. using an adaptor will be cheaper than an inlet manifold
what size of carburetor for a 390 2 barrel
50-100 USD or so
Manufactured by Stevens Arms, 1931-1941. Montgomery Wards. Hercules was just their name for this model.
In very good condition 450-600 dollars.