The Jericho 941 is a double action, high capacity pistol developed by Israeli Military Industries, and introduced in 1990. Its design is based on the CZ-75 pistol produced by Česká zbrojovka (CZ) of the Czech Republic. The pistol is assembled and finished in Israel from parts from Italy's Tanfoglio. Compared to the CZ pistol the 941 is rather heavier, with a shallower slide that can be harder to pull for some shooters. There is also a polymer framed version available. 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 mm Luger and the other for .41 AE. The magazine was designed to feed either round, and 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. Soon after its commercial introduction, the .40 S&W was introduced to the market. Ballistically, the .40 S&W was nearly identical to moderate .41 AE loads (the reloading manuals that list the .41 AE generally say to use .40 S&W data), although commercial loadings of .41 AE were somewhat more powerful than the .40 S&W. With the stronger backing of major American firearms and ammunition manufacturers, the .40 S&W quickly pushed the .41 AE out of the market. The Jericho 941 was only on the market for 1 year before the dual 9 mm/.41 AE chambering was dropped, and the pistol was sold as either 9 mm or .40 S&W. A later compact version, the Jericho 945, was chambered in .45 ACP or 9 mm. IMI eventually dropped the "Jericho" name in the American marketplace, and renamed the line of pistols "Baby Eagle", to capitalize on the cosmetic resemblance to IMI's more popular Desert Eagle pistol line.
In 1988, IMI also developed a 9 mm Action Express, which was a .41 AE necked down to 9 mm. It offered a much larger case capacity than the standard 9 mm case, allowing velocities that matched that of the .357 Magnum when loaded with light bullets. This move anticipated the parallel development of the .357 Sig from the .40 S&W in 1994.
While the .41 AE was doomed by circumstance to obscurity, the concept of using a rebated rim to allow easy cartridge interchangeability was not lost. The .50 Action Express, developed by IMI for the Desert Eagle pistol, uses a similar rebated rim that is the same diameter as the .44 Magnum. This allows a caliber change with replacement of just the barrel and magazine. Bottlenecked pistol cartridges, which also allow caliber changes with just a barrel change, have also started become available; Sturm Ruger made a limited edition convertible P Series pistol in 9 mm/.30 Luger, Sig Sauer released the 357 Sig, based on the .40 S&W, and Cor-Bon released the .400 Cor-Bon based on the .45 ACP.
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