My AIR valve is leaking. Please help

[Jason Reed]

When i fire it, it's ok and when i just let it sit aired up it's ok. But when i fire it and hold the trigger down, it starts to leak out, seems to be coming from inside the barrel, or from the bolt. But it only leaks when i hold down the trigger. It sounds like an even flow, but sputers occasionally. i don't know what the problem is can ya'll help.

[puckmaster]

If your using CO2, It might be doing something to ir. When i used CO2, it did that occasionaly, but now i got a HPA tank and it hasn't happenend yet.

[M-a-s-sDriver]

Take your on-off assembly out of the AIR and put a light coat of mag oil on it, and that will probably do the trick. If it does'nt, just replace the on-off o-rings, and maybe just the small teflon o-ring. Remember how a Mag works: When you pull the trigger, you shut off air flow to the bolt. So if it is leaking with the trigger pulled, air is getting past the on-off assembly.
Brent Jackson, PFB.