a Real-Life Gauss Rifle - thought you guys might enjoy

Some years, depending on my Engineering Tech student group and how motivated they are, we build a project that's relevant to the classwork. I built a potato gun the year before last, for example, to study gas expansion, projectile motion, and so on (it has to be classroom relevant, as I said). 

Anyhow, this year the students approached me right away with this:

http://www.deltaveng.com/gauss-machine-gun/

I was like O_O

Yes! Let's do this! Let's build the first weapon for my fighting machine! :)