gorilla Posted Saturday at 12:40 Share Posted Saturday at 12:40 Hi, I have a few WE M4 mags which seem to have developed an issue. Once I fire the first shot, the mags vent all the gas out the barrel. Other mags work fine. Any help is appreciated Link to comment Share on other sites More sharing options...
EDcase Posted Saturday at 14:38 Share Posted Saturday at 14:38 Sounds like the output valve is a bit sticky. You'll need to remove it and clean (possibly replace) the seals. You just need a valve key like THIS. Nick G 1 Link to comment Share on other sites More sharing options...
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