Hispano-Suiza HS.820

The HS.820 was a 20 mm caliber autocannon developed by Hispano-Suiza primarily for aircraft use, but more widely used in a series of ground-based anti-aircraft guns. After Oerlikon purchased Hispano's armaments division in 1970, the HS.820 became the Oerlikon KAD, supplanting Oerlikon's own and KAB weapons in the process. A US-built model, the M139, saw some use on vehicles.

Hispano-Suiza HS.820

The HS.820 was a 20 mm caliber autocannon developed by Hispano-Suiza primarily for aircraft use, but more widely used in a series of ground-based anti-aircraft guns. After Oerlikon purchased Hispano's armaments division in 1970, the HS.820 became the Oerlikon KAD, supplanting Oerlikon's own and KAB weapons in the process. A US-built model, the M139, saw some use on vehicles.