The FN Forty-Nine is a recoil operated, locked breech semi-automatic pistol developed by the Belgium company Fabrique Nationale (FN). The Forty-Nine uses an improved linkless locking principle intended for police use. The pistol is striker fired and uses FN's Repeatable Secure Striker mechanism. This means that unlike many other striker-fired pistols, such as the Glock family, the Forty-Nine operates on a double-action only (DAO) trigger mechanism, meaning that the hammer is cocked by the trigger pull before every shot. This allows the user to re-strike a misfired cartridge simply by pulling the trigger again. The Forty-Nine has no external (manual) safety switches. The double-stacked detachable magazine holds sixteen rounds in 9mm caliber and fourteen in .40 S&W. The frame is constructed of polymer and the slide of stainless steel. An accessory rail under the barrel allows for quick and easy mounting of laser aiming modules and flashlights.
As of 2008, the FN Forty-Nine pistol has been discontinued by FN.