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You're in luck, I have!!!!!

I made one based off the principle of this

To trigger it, I used a Clippard MJV-03(you have to make sure it's 03) push button valve, and I used cheap 4mm line and fittings.
In total, it was like $35 to build, and capable of very high power, and it worked very well.
I can't remember why I took it out, but I guess I did for some reason.

I can draw a diagram of what I did if you like, if you would like to try and make one.
 

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I've actually researched homemade HPA setups for application to a DIY overpowered nerf gun. There is a special valve called a Quick Exhaust Valve, which was 3 ports and two settings (it's also known as a 3/2 valve). When pressure is going in from the tank, it fills up a small secondary tank but closes off the exhaust port. When pressure isn't going into the valve from the main tank, that first entry port is closed but the exhaust port is opened, releasing all the air from the secondary tank. Basically, you could create some sort of semiautomatic system with it, though the valves are a little pricy. Kinda cool! Don't know how easily it could transition over to airsoft, but it's worth a shot. Another fun fact I learned: You can actually buy hand pumps capable of 4500 psi for under a hundred bucks!
 

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Discussion Starter · #5 ·
I've actually researched homemade HPA setups for application to a DIY overpowered nerf gun. There is a special valve called a Quick Exhaust Valve, which was 3 ports and two settings (it's also known as a 3/2 valve). When pressure is going in from the tank, it fills up a small secondary tank but closes off the exhaust port. When pressure isn't going into the valve from the main tank, that first entry port is closed but the exhaust port is opened, releasing all the air from the secondary tank. Basically, you could create some sort of semiautomatic system with it, though the valves are a little pricy. Kinda cool! Don't know how easily it could transition over to airsoft, but it's worth a shot. Another fun fact I learned: You can actually buy hand pumps capable of 4500 psi for under a hundred bucks!
yes....this is the pneumatic solenoid 3 way valve right?...I am curious about this if the bigger pneumatic solenoid valve stores more pressure air than the miniature one?
 
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