The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World...

artillery manufacturer famous for its adaptation of the 1916 20 mm Becker as the Oerlikon 20 mm autocannon design, which was used in the Second World War...

war. The Becker also served as the pattern for the famous Swiss-built Oerlikon 20 mm cannon, which is in service to this day, and in a later form, was the...

The Oerlikon GDF or Oerlikon 35 mm twin cannon is a towed anti-aircraft gun made by Oerlikon Contraves (renamed as Rheinmetall Air Defence AG following...

the original Oerlikon 20 mm cannon, in turn based on the German Empire's Becker 20 mm cannon of World War I. In the post-war period, Oerlikon had developed...

Polish development of the 20 mm Oerlikon gun. The Polsten was designed to be simpler and much cheaper to build than the Oerlikon, without reducing effectiveness...

new round was one of two post-WWII European 20 mm designs, the other being the 20×128 developed by Oerlikon for a similar role. The HS.820's high 1,100 m/s...

Rheinmetall Oerlikon Millennium Gun or Rheinmetall GDM-008 is a close-in weapon system designed by Rheinmetall Air Defence AG (formerly known as Oerlikon Contraves)...

all the ships with 20 mm and 40 mm batteries had them removed, and four Phalanx CIWS mounts were added to all. The Oerlikon 20 mm anti-aircraft gun was...

Hispano-Suiza HS.820. It fires the same 20×139 mm round. The need for a newer 20 mm defence cannon than the Oerlikon 20 mm cannon began to grow noticeably during...