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[–] 16 points 8 months ago (2 children)

It's more that using multiple barrels keeps any one barrel from heating up too quickly, and it's easier to have multiple barrels than entire firing assemblies.

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  • [–] 1 point 8 months ago (1 child)

    Not only that but the barrel is rotating quite fast which encourages cooling.

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  • [–] 1 point 8 months ago

    Sure, but realistically air isn't a good enough heat conductor for this to help much. Fixed machine guns used to use water-cooling but that's been phased out and modern weapons simple replace the barrel when it gets too hot.

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