I don't know if I've mentionned it but I need something not too big and light. I don't want to make a cannon but more like a gun or small rifle.

What do I ask for in an aquarium store? What are those tanks for?

Me, being a curious nerd, once watched how they refilled our schools expired chemical fire extinguisher. What the guy did he had these co2 cartidges and just connected them out sides, there was a little shhhh sound and then he dis conected it. If my memory is correct that is, but why dont you jsut ...

It's a refillable extinguisher but I sure would like to know how they do it. Do they simply press the handle and plug a fitting at the end. Or, do they unscrew everything?

My other concern is with the threads. They might not be NPT.

My extinguisher is rated up to 300 psi. I only want to know if it's possible to reload it with air. How do the specialized companies reload the chemicals in it?

Is it possible to reload an empty dry chemical fire extinguisher with air, to use as a chamber for an airgun? If so, how?

Thank you

It's exactly the one I was talking about. It says "in stock" but the store still has to order it and it will take 2 to 3 days... I know I just called...

Thank you for the procedure. It will be quite handy.

It's so damn hard to find a QEV in this world!!! :x Why the hell?!? I only managed to find one ½" threaded aluminum QEV at Fastenal in Quebec and it's not in stock! Hope I'll be able to screw it to copper or brass fittings... Even when searching Google, you only find QEVs in China! Is it a prohibite...

Just to make sure we all understand each other, I'm talking about a ½" barrel going through the whole 3" air chamber and getting out the front and rear ends. I will drill a hole in each cap so the barrel can go through. The drawing isn't exactly what I meant... The pipes won't be threaded. Pocket, w...

Thanks for the CPVC/PVC comparison but I don't want a link for the copper. I need an answer because I know a lot of you here joined copper to PVC. What did you use? Epoxy? And your link doesn't show anything else than a blank Home Depot page. Any of you ever tried: http://www.homedepot.com/webapp/wc...

I'm trying to build my first airgun and I'm having a hard time finding the right material in canadian hardware stores. I finally managed to find PVC at Home Depot but still, not a big choice. I think I'll be getting everything at Fastenal. My first question is how to make a ½" copper barrel stick to...

This might be a stupid question to ask but what about paintball gun stores? Do they have any QEVs? What about the tanks they use? Can they be easily modified to increase pressure with air? Let's say at 200+ psi? What's their usual pressure rating?

Can you fire anything else than paint in those guns?

The hardware stores I know don't have any QEVs. They don't even know what they are! I'll have to try Fastenal. When I look at their catalogue though, they don't seem to have threaded ¾" QEVs. It stops at ½" (aluminum only). They seem to have only tube x tube ¾" ones. I sure am not going to weld anyt...

Well, that's great to know!

Thanks!

Yes, but are you talking about a 150 psi rated QEV?