This is how i made my portal gun for halloween 2011.
it is one of many way that you can make a portal gun. i made it this way because my experiances with these materials were higher than any other method.
Ive entered this to the Hurricane Lasers Contest, if you like it enough could you please vote for me at the top of this page.. Thank you in advance. :D
Step 1: Materials
Blue insulation foam for the main shells of the gun.
the barrel and body were made from PVC pipes at 110mm and 70mm and one clear 65mm tube. also a solid clear acrylic rod at 20mm
plastic acrylic sheet for detailing parts.
three black cables (thick electrical cable is fine) and wire to put inside. or three wire core foam wrapping strips (like the hair curling things. i found mind at a general store or DIY store)
for the electronics i had two bright blue LEDs and two red LEDs (shoud be orange but i didnt have any) a three way switch, an assortment of wire and a 9volt battery.
emulsion paint, filler primer spray paint, plastic primer spray paint, lots of white spray paint and black spray paint.
car body filler (most commonly called bondo) i used P38 polyester filler.
Glue! lots of glue ranging from two part epoxie and super glue.
also masking tape.