Step 3: The trigger

The air chamber allows air to be be pumped in to create the firing pressure.  To release this, you need a trigger to let the pressure out from the chamber quickly. This uses a stop-valve from a washing machine.
awesome gonna make a similar one. im interested in blowguns but mine (just a pvc pipe) shattered when my freind use it as a sword so im gonna use the darts from that and this to make a nice air rifle that might be a little dangerous. but hey who cares...better than being stuck inside all day <br>
Great design, simple yet works great.
Hi. <br> <br>many thanks. It was fun to make and reasonably accurate (and not too dangerous! <br> <br>

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Bio: I like making all sorts of stuff, out of found materials: furniture, wild food, whatever! I've learnt loads from generous people out there, so ... More »
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