The FN PS90 is the 16" civilian legal version the FN P90 Full auto short barreled PDW bullpup. The stock features Synthetic thumbhole bullpup design, forward handstop, and molded-in rear sling attachment point. The barrel is Hammer-forged, chrome-lined with Ported muzzle brake. The FN PS90 uses proprietary 5.7x28mm ammunition; it resembles a shortened 5.56x45mm cartridge that is used in the standard M4 rifle. Small, lightweight and fast, the 5.7x28mm PS90 is easy to shoot and fully ambidextrous with unique top loading magazine and bottom eject left or right handed shooters don't have any issues. Translucent magazines give the shooter an instant feedback on how much ammo is left, and simple breakdown of parts make the PS90 easy to clean and maintenance.