• Soggy@lemmy.world
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      5 days ago

      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.

        • Soggy@lemmy.world
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          4 days 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.