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I'm aware of the increased bulkiness of water-cooled machine guns that makes them unsuitable for squad use. But why are they not used in stationary emplacements or on vehicles anymore? A water-cooled machine gun can fire continuously without overheating far longer than a Gatling gun can, and doesn't require electricity either. So why have they fallen out of favor, while standard heavy machine guns and Gatling guns are still in use?
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