Wow...the timing on this is fortuitous. I need a blaster, was thinking of building one of these, then, voila. The resident genius posts schematics.
Not to sound like too much of a nooB idio, but what were people planning to make these from?
I'm sorta thinking of cutting the grip/body portion out of wood, using some pvc for the barrel housing/upper receiver, then metal rod for inner barrel. But that might not be the best way. Can't wait to see what people come up with.