gorilla Posted April 12 Posted April 12 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
EDcase Posted April 12 Posted April 12 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
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