Love the disclaimer on the FAQ page:

"Only you are responsible for your actions."

thats cool. now we need some gristle-gun plans.

I was considering building one of these for a while - I never summoned the determination to do it, but I found a lot of great information. For example, here's a nifty coilgun site:
www.anothercoilgunsite.com/
...and the video:
www.anothercoilgunsite.com/vid7...x.wmv

But if you're really interested, check out the World's Coilgun Arsenal. It has a list of every model of home-made coilgun, and their respective sites:
www.coilgun.ru/

<thinking>
Hmm, so if I read this right, the idea is to switch on magnetic fields, in succession, to pull a ferromagnetic object down a tube.

=(1)=(2)=(3)=
And it looks like they're turning #1 on while #2 and #3 are off, then turn off #1 and #2 on when the object gets in the middle of #1. Etc...

I suppose the first thing I'd ask is why not have All three on at the beginning, and shut them down as they get to the center of each generator?
If I remember Physics 102 correctly the three should generate one big field centered on #2 until #1 is shut off, then the center moves between #2 and #3 until #2 is turned off, then it's all #3. The overall field strength should be greater and the accelerated center points might increase velocity.

Um, I love you for posting this.

Hmmm. Yeah, it's that damn battery problem again. Damnit, how are we ever going to get cool sci-fi weapons if we don't have high-energy pocket power cells?!