Stuey Posted September 10, 2013 Report Share Posted September 10, 2013 I have a problem with one of MP7 magazines - the fill valve doesn't seem to work properly. It fills as normal for about the first second but then it starts spewing liquid gas straight back out, despite being a silent fill valve. Thus I can't fill the mag properly. Short of just buying a new valve, what do I do? I know you can take these things apart, but I can't figure out how. Here is the valve: Link to post Share on other sites
Tom Andrews Posted September 10, 2013 Report Share Posted September 10, 2013 The little brass collar at the bottom should unscrew, revealing a spring and a collared pin with a tiny O ring. Problem is removing the brass part without marking/distorting it. Sometimes they just unscrew with finger pressure, sometimes you need gentle force withpliers. Try not to use those with serrated jaws. After all that, I have no idea what is causing your problem re filling. Link to post Share on other sites
Stuey Posted September 10, 2013 Author Report Share Posted September 10, 2013 Well I just took it apart (needed a vice and pliers) and put it back together and it works! No idea what was wrong with it, but as far as I'm concerned Mr. Andrews you just fixed my gun - thanks! https://www.youtube.com/watch?v=v3rhQc666Sg Link to post Share on other sites
Inari Posted September 13, 2013 Report Share Posted September 13, 2013 Most of the time it's as simple as something being out of place slightly, and reseating it solves the problem Link to post Share on other sites
renegadecow Posted September 14, 2013 Report Share Posted September 14, 2013 But sometimes it's not and you have a torn o-ring. The little one especially is hard to find replacements for; good thing there are disposable lighters. Link to post Share on other sites
Stuey Posted September 16, 2013 Author Report Share Posted September 16, 2013 Speaking of which, does anyone know the dimensions for the silent fill o-ring? If I knew the size I'm sure I could get them cheaper than here. I've just taken apart one of those Chinese grenade gas charger things, I think it needs a new o-ring inside the fill nozzle on top, tiny little bugger... Link to post Share on other sites
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