The Viper Jaws is the standard service pistol of the Jordanian armed forces, built by the Jordanian firm KADDB (King Abdullah Design and Development Bureau). The Viper Jaws was originally designed by the American designer Widely Moore (whom had previously designed the Widely Pistol) and is available in three different calibers: 9x19mm Parabellum, .40 S&W and .45 ACP.
The Viper Jaws has a simple double action mechanism, perhaps more familiar to a revolver than a pistol. When the Viper is fired the recoil rotates the barrel, unlocking itself from the slide, following a curved track engraved onto the inside of the frame. This system, along with the trigger , are easy to access via a removable side plate on the right side of the frame. This design lead to the Viper Jaws name, with Jaws being an abbreviation for "Jordanian Armament Weapons System".
The Viper Jaws is designed to be as reliable as possible, with a modular construction. The action, frame and extractor are all very basic in design but are stronger for it, making the Viper Jaws a very reliable firearm. Stripping the Viper is extremely simple also, requiring no tools to disassemble or reassemble.
The Viper Jaws is also simple to convert to any of the three available calibers, thanks to the ease of disassembley. This conversion (which also requires no tools) demands a change of barrel, extractor, magazine and breech face insert, all accessed by by a series of sliding panels and small clips. The grips can also be changed with ease to virtually any size or shape, only requiring to be prised off (and relocated onto) the location pegs.
The safety mechanism is simple and ambidextrous, using a simple lever, which also decocks the Viper when the safety is engaged. The iron sights of the Viper are simple dovetails (both front and rear) but a different configuration can be fitted (or indeed a scope).
The Viper Jaws is used in various applications by various organisations. In its standard, civilian form the Viper Jaws can utilise any of the three available calibers: 9x19mm Parabellum, .40 S&W and .45 ACP, fired from a 10 shot magazine. In military and police use the Viper Jaws can be ordered with any magazine size, while the maximum capacity for a civilian Viper Jaws limited at 15.
The Viper Jaws has become the standard issue service pistol for the Jordanian Armed Forces, its reliability and adaptability being major factors in its choice. The Viper Jaws is also used, in limited numbers, by several police forces as well as being available in the civilian market in America.