Volpin V1: [link]
*Best portal gun I know. Don't try to follow this unless you have the materials, tools, money, and skillset, as this is pretty much a professional go at the portal gun.
Volpin V2: [link]
Basically a slightly cheaper version of Volpin's, using papier mache rather than plastic.
Using only papier mache and cardboard. Other WIPS in gallery.
Cost of materials in this part:
Wireform mesh: $8.99
Total cost of materials:
So yeah, I'm building a portal gun. This is about two days of work after school and whatnot. There will be more parts--next I'm going to put on the papier mache and *maybe* get started on the barrel.
Part 1 -here-
Part 2 [link]