The Bofors 40 mmAutomaticGunL/70, (Bofors 40 mmL/70, Bofors 40 mm/70, Bofors 40/70 and the like), is a multi-purpose autocannon developed by the Swedish
The Bofors 40 mmAutomaticGunL/60 (often referred to simply as the "Bofors 40 mmgun", the "Boforsgun" and the like, see name) is an anti-aircraft autocannon
The 37 mmautomatic air defensegun M1939 (61-K) (Russian: 37-мм автоматическая зенитная пушка образца 1939 года (61-К)) is a Soviet 37 mm calibre anti-aircraft