... Good thing this topic isn't locked - new problem. Piston won't open up again *facepalm*, cylinder is lubricated and it goes smoothly. All the air is coming out the blowgun. Anyone got any idea? Edit: Problem started after I put the gun in water to check for leaks, and after I tried superglueing ...

http://www.bleachernation.com/wp-content/uploads/2011/08/houston-we-have-a-problem-cat.jpg New problem popped up: My blowgun is leaking from the pin part which is pushed to open the valve (Seriously, wtf?). Anyone got any ideas how to seal it up?.. I can't use any tape because then it wouldn't clos...

Fixed it :) Works AMAZINGLY well at only 40-30 PSI I managed to pass through a leather pillow from 5 meters with a 6mm ceramic BB. All I needed was a bigger piston, no spring and it just worked (you had to see the look on my face when I heard the pop sound of the air going out the barrel for the fir...

The piston has plenty of room to open, according to Gun Freak's directions (PM's) I am making a new piston because mine was problematic, one without grooves and without a spring.

I'll update back again after I test the new piston.

What cylinder?
The chamber which get's air pressurized, the part where the piston slides in or what?

I will upload any picture you ask for, really want to get this gun working lol.

Answering for both questions: The piston seals perfect, it was longer (1cm longer) and I made it shorter to see if it's equalizing. The barrel is sticking out of the bigger tube so it pushes the piston back a little bit, so the piston is on it's rail, moving smoothly back and forth. The piston isn't...

Hi, New here and working on my 2nd gun (first one had a normal ball valve, YouTube video of the old gun will be on the bottom of the topic). I have chosen to make a coaxial piston valve to save space and because I think it's the most aesthetic design out there (unless you have milling machines, lath...