PISTOL: AMERICAN DERRINGER MODEL 1 IMPORTED BY AMERICAN DERRINGERUS, SERIAL NUMBER 97703, DERRINGER, 357 MAG Notes: Our Derringer is in good condition with the original box, case and papers. American Derringer chambered in .357 Magnum, a compact and distinctive double-barrel derringer designed for maximum portability. Featuring a simple over-under configuration, break-open action, and rugged construction, this classic pocket-sized pistol offers a unique combination of traditional derringer styling and powerful .357 Magnum performance. Caliber: .357 Magnum Action: Break-Open Configuration: Over/Under Double Barrel Capacity: 2 Rounds Manufacturer: American Derringer Compact and unmistakable, the American Derringer in .357 Magnum combines classic derringer design with the power and versatility of the .357 Magnum cartridge.