M203 shells dont hold any gas
searched and found nothing so here she is...
Just bought 2 King Arms 90 round M203 shells from A&A airsoft, got em, filled em (propane), loaded BB's in em (KSC 0.20's), fired em (G&P M203 RAS), great! After that I let them sit on my nightstand for about an hour empty, tried to fill em again and all the gas just automatically vents out the "barrels" that hold the BB's. There is a pop sound just before it starts so its as if it can hold a tiny little bit of pressure but then just pops the valve open. I've tried lubing the bottom button that opens em but it did nothing but give me a face full of silicone oil. I filled them the first time without any BB's in the barrels and it worked fine and am afraid to try it with BB's in it in case they all blow out at my hand as I fill it. Is there some hugely obvious thing I've missed (its not like these things come with instruction manuals, yes I do always read instruction manuals) or did I just get lemons?
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