FN 303
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The FN 303 is a semi-automatic less-lethal riot gun designed and manufactured by Fabrique Nationale de Herstal.
The FN 303 uses compressed air to fire projectiles from a 15-round drum magazine. Wikipedia
Caliber: 17.3 mm (0.68 in)
Feed system: 15-round detachable drum magazine
Manufacturer: FN Herstal
Mass: 2.3 kg (5.07 lb)
Place of origin: Belgium