The introduction of the Jericho 941 also introduced a new caliber to the market, the .41 Action Express (or .41 AE), which was developed in 1986. The .41 AE was a unique rebated rim cartridge designed to use .410-inch (10.25 mm) bullets and duplicate a reduced power police loading of the .41 Magnum. The Jericho originally shipped with two barrels, one for 9×19mm Parabellum and the other for .41 AE. Since the .41 AE was designed with a rebated rim the same dimensions as that of the 9 mm, the extractor and ejector worked equally well for either cartridge.