Glock Magazine doesnt fill up.
 

I juste bought a We g17 and an aditional mag and one of the mag doesnt hold air. I use valken green gas and my secondary mag work 100% with this can.

halp?

thanks

Is it leaking and if so from where.

orings could be misaligned or worn

I've had a weird problem once where I sold someone a WE G17 mag that wouldn't fill properly. Changed the fill valve and it was fixed.