ADEN cannon A quad 30 mm ADEN cannon pack removed from a Hawker Hunter Type Revolver cannon Place of origin United Kingdom Service history Used by See users Production history Designer Armament Development Establishment Designed 1946 Manufacturer Royal Small Arms Factory Produced 1953–present Specifications Weight Overall: 87.1 kg (192 lb 0 oz) Barrel: 12.25 kg (27 lb 0 oz) Length Overall: 1.64 m (5 ft 5 in) Barrel length 1.08 m (3 ft 7 in) Shell 30×113mm Caliber 30 mm (1.1811 inch) caliber Barrels Single barrel (progressive RH parabolic twist, 16 grooves) Action Gas operation featuring a pneumatic cocking system and a 26 volt DC electrical firing system Rate of fire 1,200–1,700 rpm Muzzle velocity 790 m/s (2,600 ft/s)