making a zip gun

I'm making a zip gun just for the fun of it.. i promise a won't kill anyone but maybe myself by accident.

anyway, here is the gun i am making
http://www.textfiles.com/anarchy/WEAPONS/rm-gun01.txt

has anyone ever made one using these instructions before? I have no clue what kind of pen and where to get the metal cylinders.. also a strong spring.

In some places the instructions are a little unclear so is there any advice?

Don't post in this thread about how it is dangerous and illegal. I know it is illegal and i can get a hefty fine for it, but i really don't care because i'm not going to carry it around.

 

That sounds really complicated...too much for me...

 

lol ya... i aint guna read all that...

 

all it is is a pen, 2 metal rods, and a .22 bullet.. but i don't know where to find the right materials.

 

thats a badass idea. wish i had one.

http://www.youtube.com/watch?v=Y2N7yR66wes

i like this one... and it works

http://www.youtube.com/watch?v=cPOGLJZJrDo

 

omg your actually using a real bullet. My dads a cop and my garage has like 20k+ bullets so that would be easy to supply.....

 

very complictaed!

 

Most of that crap can be found at staples, or BJ's. A metal bar can be trimmed down to size at home depot or lowes. Though, I don't know where to get a .22CB

 

Yes I saw this. You can buy these one websites, but they cost over 300 USD. The one I am making will cost about $5 at the most..