HFC M190 Gas leak

[vode635]

So just yesterday I pulled out my virtually brand new HFC M190 Special Force pistol for my dad to shoot, just to give him a taste of airsoft. After loading up two clips with 20+ BB's and propane we discovered that neither clip could get off more than 3-4 shots before running out of gas.

I have emptied both of my clips previously with no problems, having enough for over 30 rounds normally. The clips seem to hold gas without any problems when they are filled out of the gun, but they leak if they are left inside the grip when filled, which I am pretty sure is not supposed to happen. To the best of my knowledge there has been no major damage to the gun, and up until yesterday it had functioned flawlessly for at least 75 shots.

Does anyone have any idea what might have happened or what might be done to fix the problem?

[SteevoLS]

Every GBB I have ever owned has vented gas if I fill it while it is in the gun.

If neither mag is audibly leaking, then I think...
1) It's cold, and cold mags don't work well at all.
2) Your propane tank is almost empty.

[vode635]

The tank is still about half full, so I don't thin that's it. And it wasn't all that cold as far as I could tell, unless the propane is a lot more sensitive to cool temperatures than I originally thought. I'll see if I can test it somewhere warmer at a later time, don't know of any place I can do that right now. Thanks dude.

[JumpGunner]

fill the mags while they are out of the gun. They will not fill if they are left in the gun. venting gas while filling the mag while seated in the magwell is normal.

[Dominum]

I fill GBB mags inside of GBBs all the time with no problems, I've done it several times in many KWA Glocks, as well as TM Glocks and WE 1911s... probably more. The only HFC I've ever done it in was a Mauser C96 Carbine years ago, but it didn't leak when I did it either. Honestly I can't think of a reason why it would unless the hammer is actively engaged with the gas discharging "button" on the mag, which it aught not to be. If the mags don't leak at all when out of the gun, but leak slowly when left in the gun, my guess is something is pressing that "button".