G&G SMC 9 300 round Green Gas Pistol Drum Magazine for SMC9 a nd GTP9 - Airsoft Extreme
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HFC DRUM MAG HD SERIES / Metal / Gas & HPA Operated / Airsoft Unboxing Review - YouTube
Amazon.com : Evike AW Custom Drum Magazine for Gas Blowback Airsoft Pistols & Rifles (Type: SAI BLU/TM G-Series/Elite Force Glock/Black) : Sports & Outdoors