Algodoo

Idea of Magnetic Accelerator Cannon id pretty simple: metal projectile using a linear system of magnetic fields coils down a long shaft, increasing the projectile's velocity until it carries an incredible amount of kinetic energy.An extremely large amount of current is put through the first solenoid (coil of conducting wire) which creates a strong magnetic field which attracts the metal slug. As the slug passes into the solenoid, the solenoid is quickly turned off and the second solenoid, which is further up, turns on, which attracts the now high velocity metal slug just like the first solenoid, and the process is carried on.

I get the ideo of MAC gun from Halo universe where MAC based weapons are warships primary attact function.

Activate the first solenoid with F key. Have fun and feel free to involve this simple sigle shot weapon system.