The kind in movies and games
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It shoots the projectile out at 5000 mph and, lol, it moves so fast that if you look at a slow motion video of it, it bents the air and light around it to look blurry


They could make a railgun that takes less electricity. The projectile is bigger than a football, so if they go to golf ball sized...

Its called a railgun because the electricity runs along rails inside the barrel, causing a extremally powerful magnetic field that pushes the projectile very fast/far

Control the recoil of
The gun they used it in the world wars it’s insane
It shoots a double action projectile that, after the case breaks from impact, a second smaller bullet inside still goes