The World's Most Battle-Proven Firearms. Fabrique National Herstal, self-identified as FN Herstal and often referred to as Fabrique National or simply FN, is a leading firearms manufacturer located in Herstal, Belgium, owned by the holding company Herstal Group which is in turn owned by. From the battlefront to the home front, nothing compares to an FN pistol. Firearms designed and/or manufactured by FN include the Browning Hi-Power and Five-seven pistols, the FAL, FNC, F2000 and. The FN Five-seven, trademarked as the Five-seveN, is a semi-automatic pistol designed and manufactured by FN Herstal in Belgium.