Gas leak problem

[BlackDragunMan]

I got my dragun last christmas and this is my first major problem with my gun. I can still play with it and it works fine ,but i loose a lot of gas. When my gas source is in i loose a little bit as gas out of the barrel when the gun is cocked and if the gun isnt cocked a massive amount gas goes right through my gum and out the barrel. Two other people i know have this problem with there spyders. I replaced all the o-rings and i know its ethier the cupseal or the valve. Whats wrong, and how do i fix it?

[Gastric]

Sounds like the cupseal needs to be replaced.

[GoalieKeg14]

Make sure the valve is in the right way. One time I put my valve in backwards on accident and my gun started leaking like crazy. but it might be your cupseal too.

[Ebonclaw]

Cupseal or valve o-ring.

Valve removal..VERY IMPORTANT so you don't scratch:

Stip the gun, remove the VA, undo the little gold screw after take off the grip frame. All you should have in your hadns is an empty receiver except for the valve.
Now, take a battleswab or something similar and push it through the hammer tube till the valve slides out the front where the VA was. If you don't use something soft, you could scratch the valve. Not good.


The valve takes standard bottle o-rings. Good job Kingman...now fix the damned grip frame holes.
Replace the o-rings, lube, slide it back in THE EXACT way it came out.
Change out the cup seal.
Reassmeble, done deal.

I lean towards the cup seal not seating properly..maybe a grain of dirt of the cup seal is damaged. That's why it hisses but stops. I reccomend a Black Magic cup seal, it's made of a softer plastic that seal much better.