Homemade Airsoft "Flamethrower"

For a while now I've been thinking about building an airsoft flamethrower. The propulsion concept I have found in various places online, so that part is covered. It will have backpack tanks for the air pressure... You know what, just take a look at this picture :-)

That is what I would like to make an airsoft model of... 'nuff said.

--Ghost