Hello, I am building my second airgun, my first been a simple QEV+blowgun. I am trying to obtain multiple shots in semi-auto from my second gun using a QEV+Slide Valve configuration. I already looked at the other threads about this and know about GGDT and my chamber dimensions and barrel, but what i...

I actually started off by seeing your videos on youtube wyz2285 I saw your airgun sniper and your QEV explicit tutorial to build the gun I'm making now.

wow, Ill try making one out of epoxy, thanks. While i do this, i have one more question i been tying to answer. My pilot area is quite small, and to allow the the air flowing out of my pilot valve to move the piston backwards you would require a strong flow. Even with this new piston, how is the pil...

OK, i got a new problem now Like you guys said, my piston is not good for my gun. I need a very fast flow to push my piston back, and when it does it doesn't throw much of a punch. How can I make a better piston? and what material works best? Pls help

Could someone make a schematic so I could see how it works? I see its not a simple qev sniper. Thanks, I'm new to spudfiles

Great gun how does it work thou? Is it just air passing threw a pressure washer trigger into a barrel? Or does it have a qev?

I can't seem to find a psi range on the description for this valve on eBay, what would be the minimum and maximum range?

Thanks for the help, i drilled the holes and and it works better now. so far when i pump the bottle to 50psi i get a strong shot, i think if i get it to 100psi ill be able to have 2-3 shots. I got a new blowgun and made a fix to allow more airflow. Im also changing the airtank to a 1kg fire extingui...

I found out the problem. The blow gun i used only lets the air out at a slow speed, thus not been useful a a quick exhaust. I will have to try to make a pilot valve.

That's what i thought too. The piston is pretty much the same size as the QVE tube, so a tiny gap is left for air to flow. I just added some lubricant for valves and it actually worked once after trying 3 times. So its sometimes working but most of the time its not. is my piston maybe too small? I h...

yes, the seat is 12mm in diameter while the piston is 17mm. So i got 2.5mm for the chamber pressure to act on. would that be too little?

Hello everyone! I am trying to build my first airgun with QEV and barrel seal piston. As of now I have finished pretty much the whole body, but I am having problems making my blowoff gun triggering my piston to pop. i have charged my air tank (1.25L bottle) to 30psi and pressed the trigger but air e...