Kuroneko YZ got tips for you to fix the gas leak issue of the KSC M93R gas blowback magazine... "This is a gas leak repair for the KSC-M93R-AG (almost compatible with the MGC-TAITO-M93R) that has been featured on this channel several times. It's the usual repair with sealing tape, but I also disassembled the release valve and removed the rust from the rusted exterior."