air cooled gun; or, a twin or quadruple barrel (Navy type), manually or automatically (local or gun. jpg 2,690 × 2,141; 2. 20MM anti-aircraft Melara 76MM/62 caliber dual-purpose, rapid-fire guns and the Bofors 40MM AA guns. 50 calibre machine-gun). . It was adopted by the British Army in 1938 and by …

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