About 10 gauge bore that flares out to 2.125" diameter at muzzle. 23.5" octagonal to round barrel. Browned metal finish. Walnut stock has a plain straight grip and forearm, with simple moulding around barrel shank. SN: NSN. Contemporary smoothbore flintlock blunderbuss without sight. Item features double sling swivels, a contemporary white leather sling, and button head steel ramrod. Markings include U.S. stamped to center of lock and RAPA/FORGE crudely engraved to tail of lock. Brass sideplate is also crudely engraved LIBERTY/OR/DEATH. Barrel is marked with modern British proof marks.