how can i make a cheap but powerful airgun?

for under £20

fidgety28 years ago
google spud guns
just search it there tons of instructables for airguns made out of inexpensive PVC
Pilgrimman8 years ago
I would suggest a chamber made of PVC, connected to an inline solenoid sprinkler valve, connected to a PVC barrel. Fill through a quick connect air compressor fitting, or a tire valve. There are better ways, but they are more involved and expensive.