The Browning Hi-Power or 1935 Browning 9mm GP or Grand Puissance pistol is a single-action, semi-automatic pistol available in the 9×19mm Parabellum and .40 S&W calibers. It was based on a design by American firearms inventor John Browning, and completed by Dieudonné Saive at FN Herstal. Browning died in 1926, several years before the design was finalized.
FN Herstal named it the "High Power" in allusion to the 13-round magazine capacity, almost twice that of other designs at the time, such as the Walther P38 or Colt M1911. The Hi-Power was the only 9mm semi-automatic pistol available with a double-stack detachable box magazine from 1935 until the introduction of the 15-round MAB PA-15 in 1966.
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