The 12 Gauge Single Shot Shotgun Model 336882 from the Volunteer Arms Company was probably manufactured by the Belknap Hardware and Manufacturing Company that operated in Louisville, Kentucky. Iver Johnson Company and H & R, are two other gun manufacturers that made this type of shotgun.
numrich gunparts.com has everything but the stock
Crescent or HD Folsom
go to your local firearm dealer he should know
Your single shot 12 gauge shotgun was made by the Crescent Firearms Co.This company was in business from 1888-1931.Your single shot is valued at between 50-85 dollars,depending on overall condition.
Not a thing
Pretty much an impossible undertaking.