Please see pics of muzzles on my GI 100804465 listing, is what you see is a dead give-away for "reduced length" barrels? These are steel barrels dovetail lump construction.

Additional info: left barrel marked "choke" has a slight backbore 4" from muzzle then a slight taper ending with .003 constriction; right barrel not marked choke with a gradual taper 5" from muzzle ending with .007 constriction.

Any educated opinions?