The Oerlikon KCA is a Swiss 30 mm (1.181 in) gas-operated single-barrel revolver cannon developed for aircraft use. Its most noticeable use was on the JA 37 Viggen fighter^[1] mounted in a conformal pod as the akan m/75. The KCA fires a 30 mm × 173 mm (1.181 in × 6.811 in) shell that is 50% heavier than the NATO standard ammunition used on ADEN and DEFA cannon. It can fire up to 1350 rounds per minute at a muzzle velocity of 1030 m/s, with an effective range of 2,500 m (8,200 ft)

A modified version of the KCA cannon is still in use as the main armament of the Skyranger 30 short range air defence system.^[2]

• VENOM 30 mm – British 173mm long variant
• GIAT 30 - comparable French design, 150mm & 113mm long
• VENOM LR 30 mm – British 21st century derivative of ADEN, 113mm long variant
• DEFA cannon – comparable older French design, 113mm long
• ADEN cannon – comparable older British design, 111mm
• Mauser BK-27 – comparable German design, 27×145mm
• R-23 cannon – comparable Russian design, 23×260mm (telescoped)
• M39 cannon – comparable older US design, 20×102mm

Media related to Oerlikon KCA at Wikimedia Commons