Right! I have 5 mags, all KWA.
I don't have any bolt other than stock bolt, but I removed the modification to it that I had done previously and that didn't fix it.
Using Coleman propane, tried a new tank and a new adapter, bleeding the air from the mags when filling as usual.
Max 20 degrees C outside, tested in a 10 degree basement too.
Thanks for the reply!
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