I believe you just need a valve key. Take out the valve at the back and check the o-ring. If you that fails maybe open up the magazine and check for any abnormalities.
I believe you just need a valve key. Take out the valve at the back and check the o-ring. If you that fails maybe open up the magazine and check for any abnormalities.
I managed to somehow use a flat head screwdriver on my WE G36 ones. But if its leaking then oil up the O-rings with silicon oil, and wrap some PTFE tape round all the valves then screw them back in. Then you should have a nice leak free no problems magazine