What is fnfn herstal? FN Herstal is a global reference in the world of small caliber firearms, ranging from 5.7x28mm pistols to .50 cal machine guns.How do i contact fn herstal dubai? Contact. FN Herstal Dubai. Liaison Office. P.O. Box 9214 Dubai. United Arab Emirates. +971 4 331 3170. +971 4 331 30 78. E-Mail: [email protected]. FN Herstal Far East & Australasia.Where do i send fnfn sales emails? FN Commercial Sales. FN Law Enforcement Sales. and FN Military Sales. PO Box 9424. McLean, VA 22102. Phone: 703-288-3500. Fax: 703-288-4507. Email: [email protected]. What kind of gun is a fn herstal? Machine Guns FN Herstal is a global reference in the world of small caliber firearms, ranging from 5.7x28mm pistols to.50 cal machine guns. Defense and Security forces in over 130 countries around the globe have placed their trust in products bearing the FN brand.