Step 1: Obtain parts
1)capacitor bank. I used 18 400v 3900uf capacitor's in parallel. This comes out to 5600 joules. Make sure you stay above 300v, and below 600v.
These are harmless to the enviornment. They are aluminum based.
2)busbars. I used aluminum.
3)3 120uf 300v capacitors.
4) 60A 600v diodes
5)cable's. I used 00 AWG
6)rails. Copper bars here
7) 2"x.5"x12" aluminum.
8)projectiles. Make it close tolerance.
9) A railgun enclosure. I suggest designing your own. It should have a .5" bore, with strong materials.
Mines GREEN! both ways!
Email me if you want a design (email@example.com)
10) misc. support equipment.
11)PVC for injector. Use your own design. Look up "spudgun" for ideas.