WE M4 CQBR Firing problem need help

[waltherglocksmith]

I just shoot couple of mags tonight, everything goes right, then suddenly had a firing problem. The bb go out really slowly, like with a close to empty mags (empty of propane) with no pressure. But still strong to pass trough a sheet of paper, but with a weak quiet ‘’puff’’ sound, nothing like in normal operation. The mags was fully loaded of propane. I tried another mags, same thing. I dismounted the bolt, everything look normal at first view, no broken gasket or something (i'm not an expert, maybe something wrong here). I tried removing the top then insert a mags and tried to shoot one time to see if the hammer do his job pushing onto the magazine valve, seams good, a geyser of propane goes out quickly (removed the magazine quick to avoid gas lost)…. Rebuild everyting, and still
a weak shooting of bb, need to armed the bolt each time. There is no jamming issue into the barel, the bb’s load normaly.
Any idea??
Thanks for your help!!

[PugsleyAdams]

I had the same problem with my WE SCAR about a week ago! The valve had worked its way loose on the guide rod so it wasn't in the proper position to fire correctly! All you have to do is tighten the valve and put a couple of drops of blue loctite! Hope this helps!

[waltherglocksmith]

problem solved, small problem, the white plastic part as moved foward and block the small hole, I fixed it then it shoot normally