FN Herstal, formally Fabrique Nationale d’Herstal S.A., is a Belgian small‑arms and ammunition manufacturer with a 130+ year legacy in defense. It is arguably Europe’s foremost producer of standard NATO infantry weapons – pistols, rifles, machine‑guns and 5.56/7.62/12.7 mm ammunition – supplying most Western armies[1][2]. In the post‑Ukraine era’s focus on strategic autonomy, FN’s role in indigenous weapons, ammo and related technologies is pivotal. This report examines FN Herstal’s organizational profile, technology portfolio and strategic alignment with European defense priorities – especially reducing dependencies on non‑allied suppliers (e.g. China), enhancing NATO interoperability, and strengthening European deterrence. It integrates official data (company releases, EU project records) and defense analyses to gauge FN Herstal’s contributions to EU defense sovereignty, deterrence capabilities and transatlantic defense cooperation.