It seems pointless
In: 10
* When a bullet is fired down a barrel, the barrel gets hot (bullets are pushed by a hot explosion, and also make heat when they scrape along the barrel)
* Barrels are made of metal, which can melt, changing shape if it gets too hot
* If the barrel melts even a small amount, bullets will get stuck, and the gun might explode.
* Each bullet makes the barrel hotter than the last bullet.
* In a minigun, each barrel fires one bullet, then moves around in a circle, so it gets a “rest” to cool down between bullets
* If one barrel can fire 10 bullets before getting too hot, then 6 barrels can fire (at least) 60 bullets before getting too hot.
* Firing 60 bullets is usually better during wartime than firing 10.
* So that’s why they have spinning barrels.
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