How To Build A Portal Gun

So it looks like someone really knows how to hit a right note here, and has posted instructions on how to create a Portal Gun prop using semi-ordinary materials. Judging from the list of materials, this should run you only about $20 if you have some of the pieces laying around the garage.

Totally awesome for a 1 year anniversary Portal Halloween. Kudos!

Source: http://granades.com/2008/10/28/how-to-create-a-portal-gun-in-many-easy-steps/