A bullpupsubmachine gun, developed between 1986–1987 by Stéphane Ferrard at FN Herstal. It fires 5.7×28mm ammunition that resembles miniature rifle rounds, with more velocity and armour-piercing capability compared to conventional pistol rounds. The P90 introduced the PDW (Personal Defense Weapon) concept.
The weapon has a distinct futuristic appearance, ambidextrous controls, downwards casing ejection, integrated optics in the carry handle with backup iron sights on its top and feeds from an axially-mounted 50-round magazine.
