This is a copy of a German Jagger rifle circa 1730. Short Barrel large caliber primarily design for hunting in European forests. Brought to America by the Germans who setteled in the Pennsylvania region, the barrel was lengthened and morphed into the Pennsylvania rifle aka Kentucky rifle. As time went on the calibers became smaller as powder and shot was more expensive and heavier to carry. Calibers ranged from about 65 down to 32 in the 1840's. These guns were either rifled or smoothbore. This has 2 barrels (58 cal) one rifled one smooth (20 GA)