This last criterion was seen to demand a caliber of 9 mm or larger, a bullet mass of around 8 grams (123.5 grains), and a muzzle velocity of 350 m/s (1148 ft/s). It was to accomplish all of this at a weight not exceeding 1 kg (2.2 lb).įN commissioned John Browning to design a new military sidearm conforming to this specification. Browning had previously sold the rights to his successful M1911 U.S. Army automatic pistol to Colt's Patent Firearms, and was therefore forced to design an entirely new pistol while working around the M1911 patents.
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