X-valve fires while being gassed up

[Jaan]

Hi everyone...I have an X-valved twist lock 'Mag with level 10 and ULT that I got used. Although for the most part it shoots well, it does act funny.

When gassing up, it tends to fire. Yesterday, it fired SEVERAL times in a row when I gassed it up like it was on "full auto". Then, after this, it didn't want to fire at all even after the trigger being pulled. Sometimes while playing it "chuffs" and a ball just rolls out.

Where do I start?

[Ando]

The shooting when being gassed up is "normal". I have 2 valves that do it. One thing that usually helps is holding down the trigger when you gas it up.

For the other problem. Try adding a shim one at a time to your lvl 10 and try reduplicate the chuff by what ever means possible. If it's still chuffing add another shim.

If that doesn't work, ck your detentes. I had a set causing what your describing. They could be sticking and/or worn out causing the lvl 10 to activate (mine were doing both). If you don't have another set, try cleaning them out.

Last thing...

Try messing with the grip and field strip screws. They might be too tight or not tight enough. Usually the front screw is to tight and the field strip isn't tight enough. Go finger tight on the field strip then get a allen key and 1/4 turn it and just snug down the front grip screw.

If you have a aftermarket body or rail, they can sometimes cause crazy things and cinching down the field strip will fix it.

[xero28]

I have found that if you pull the trigger AFTER you degas the gun, then when you gas up again it fires. From what I understand, when you pull the trigger on a degassed gun, you pull the sear and it releases from the bolt and opens the on/off. So when you gas it up again, there is nothing to hold the bolt in and it fires. I think what is happening with the full auto stuff is that as you are screwing the tank in, there isn't enough pressure to fully engage the on/off pin to push the sear and catch the bolt. So, until that pressure is reached, it just keeps going. See what happens if you degas, don't touch anything, then gas it up again.

Edit: The problem with this is that if you take your valve out, you have to pull the trigger to move the on/off pin to allow the valve to come out. So when you gas up again you either have to take off the grips and engage the sear to hold the bolt, or just know that it's going to fire.

To help keep it from firing "full auto", try screwing the tank in faster.

[Jaan]

Thanks for the replies. I've always held the trigger while gassing up a 'Mag...that's what Tom told me to do way back when in the video I got with my first 'Mag lol. I've never had a classic 'Mag shoot while gassing up. I've owned several but this is my first X-valve. Thinking that holding the trigger may be the case I didn't do it yesterday but still had it shoot.

I guess I'll have to fool around with the level 10, and the screws. Could it also be a ULT problem? It's set pretty sensitively, I've accidentally fired it before just holding the gun and brushing the trigger with my finger.

Nothing aftermarket on this gun, it's all AGD. Body, sear, twist lock pin and detents are new, the rest (besides the valve) nearly so. Here is a picture...

[athomas]

It is generally caused by air getting by the on-off top orings before the pressure is high enough to fully seat them. When you hold the trigger it helps, because the pin is farther in the oring and has more contact area. Its not usually a problem with the level 10 equipped guns because the level 10 requires that the chamber pressure be high enough to push the bolt spring (which is close to full chamber pressure). It could be an oring that is bad. Noting that there has been other instances of chuffing, I would recommend a good cleaning for all the internals.