20 mm caliber is a specific size of popular autocannon ammunition. The dividing line between smaller-caliber weapons, commonly called "guns", from larger-caliber...

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

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 War...

The Tarasque Type 53 T2 is a 20 mm anti-aircraft gun adopted by the French Army. The Tarasque is based on the M693 F2 20 mm auto-cannon and mounted on a...

The 20 mm AA Machine Cannon M/38 was a 20 mm rapid fire autocannon produced by the Danish company Dansk Industri Syndikat (DISA). The gun, which could...

Rheinmetall Mk 20 Rh-202 (short for Maschinenkanone 20 mm Rheinmetall) is a 20 mm caliber autocannon designed and produced by Rheinmetall. It fires the 20×139mm...

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...

– NTW 20 X 110". Denel Land Systems. Archived from the original on 6 May 2013. Retrieved 21 May 2013. "NTW 20 anti-materiel rifle 20 x 110 mm HS". Denel...

The Becker Type M2 20 mm cannon was a German autocannon developed for aircraft use during World War I by Stahlwerke Becker [de]. It was first mass-produced...

Type 98 20 mm AAG (anti-air gun) tank (Japanese: 日本語: 試製対空戦車 ソキ) was a Japanese self-propelled anti-aircraft gun using a twin Soki Type 2 20 mm anti-air...