Navy Flying Unit United Arab Emirates Air Force Fleet Air Arm Royal Air Force Notes See also DEFA cannon – comparable French design Mauser BK-27 – comparable German design M39 cannon – comparable US design VENOM LR 30 mm – 21st century derivative, designed to fire from RCWS References External links Mauser and Aden Cannon (RAF source) 30 mm artillery Aircraft guns Autocannon Military equipment introduced in the 1950s