[kullwarrior]

I just got the new GHK WA M4 magazine, every thing at first seems fine but now Im getting problems, and its a safety hazard in my opinion.
For some reason after few shot (anywhere from 1 to 20) when you fire it the release valve will open and stay open untill all the gas escape. I had this happen today. Basically what I do is:
1) Fill the mag (3-4 seconds, which is near full)
2) Let it sit in the sun (28 degrees celisus) for 2-3 minutes to warm up
3) Load up bb
4) Pre-Rack my M4 Gbb
5) Load up and charge the handle
6) shoot
7) on 2 and 7 (twice happened, different magazine) shot the all the remaining gas escape
During the massive release, magazine release button, charging handle cann't work. Hamme is in uncock position. Basically I have to wait until all the gas escape then its good.

Background info:
*G&P WOC M4 w/ RA-Tech bolt carrier and buffer spring (don't think thats the issue)
*I have 5 GHK Magazine, one was stuck to the point where I had to use a hammer to get it out, so 4 operational (That broken one is going towards my pmag conv)
*atleast 50% of my mags has this problem
*Using propane