the designation 70 was for the first year of production: 1970. The Smith & Wesson Model 59 was a 14+1-round, semi-automatic pistol introduced in 1971. It was the first standard double-action pistol to use a high-capacity 14-round staggered-magazine. It went out of production a decade later in 1980 when the improved second generation series was introduced (the Model 459). The Model 459 was again improved into the third generation series, the 5904. Stainless steel versions of the second and third generation models were also widely popular, and were designated the Models 659 and 5906, respectively. The original Model 59 was manufactured in 9×19mm Parabellum caliber with a wider anodized aluminum frame (to accommodate a double-stack magazine), a straight backstrap, a magazine disconnect (the pistol will not fire unless a magazine is in place), and a blued carbon steel slide that carries the manual safety. The grip is of three pieces made of two nylon plastic panels joined by a metal backstrap. It uses a magazine release located to the rear of the trigger guard, similar to the Colt M1911. The Beretta 92 is a 15+1-round, 9mm Parabellum, double-action, semi-automatic pistol introduced in 1975. It has an open slide design, an alloy frame and locking block barrel, originally used on the Walther P38, and previously used on the M1951. The grip angle and the front sight integrated with the slide were also common to earlier Beretta pistols. What may be the Beretta 92's two most important advanced design features had first appeared on its immediate predecessor, the 1974 .380 caliber Model 84. These improvements both involved the magazine, which featured direct feed; that is, There was no feed ramp between the magazine and the chamber (a Beretta innovation in pistols). In addition, to a 15-round "double-stacked" magazine design, It was the first Beretta design to use a magazine release located to the rear of the trigger guard, similar to the Colt M1911. The United States' military replaced the M1911A1 .45 ACP pistol with the Beretta 92FS, designated as the M9 in 1985. The Glock 17, is a 17+1-round, 9mm Parabellum, polymer–framed, safe-action, short recoil-operated, locked-breech semi-automatic pistol designed and produced by Glock Ges.m.b.H., located in Deutsch-Wagram, Austria. In 1982, the Glock 17 entered the Austrian military and police service after performing the best out of other models in an exhaustive series of reliability and safety tests. Despite initial hesitation from the