I'm sure we've all seen those freakishly cool Portal Replica Guns that are now sold out for what seems like forever. You could wait for those to restock (I wouldn't hold your breath) OR you could take the considerably cheaper and more creative route by following watch this video and create your own Portal Gun!
The geniuses over at Indie Mogul have put together a great tutorial so you could do just that. The video shows you all the items you need and easy to follow, step by step instructions on how to replicate your own Portal Gun without killing yourself!
These guys are so considerate. Check out the video below and then start gathering your supplies!