You should not be using WD40 on airsoft guns, it is corrosive to the Orings and will cause them to wear and leak. If you HAVE to use WD40, strip the mags, remove the orings, spray it down with WD40: scrub it clean, rinse the whole thing out with WATER, relube with 100% silicon lubricant, relube orings, put orings back in the mags, gas them to check for leaks.
At least, that's what I would do if I got some rusty mags. :|
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Ár skal r?*sa, sá er annars vill
fé eða fjör hafa. Sjaldan liggjandi úlfur
lær um getur né sofandi maður sigur.
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