COIL GUN Coil Accelerator Magnetic hysteresis carbon steel bullet

 https://www.popularairsoft.com/spotted-north-shore-sports-club-coil-accelerator

https://www.youtube.com/watch?app=desktop&v=JqCHuwemHYU

Coil Gun with 3 levels electromagnetic accelerator

Coil gun - Bullet Speed - Energy Speed - Calculation 

https://www.guns.com/news/2022/06/20/coil-accelerator-the-gun-of-the-future