GHK M4 GBB Magazine - Version 2 (Green Gas) 249 The 18000 motor is the

The 18000 motor is the world's first airsoft motor that combines 28 TPA with high-strength neodymium magnets inside precision CNC-machined externals

32-round magazine

Comes with a compact DMR magazine

Improved air seal results in better compression for increased power

Aluminum buffer tube (with true quick change spring through the buffer tube)

GHK M4 GBB Magazine - Version 2 (Green Gas) 249 The 18000 motor is theSpare gas magazine for the gas blowback M4 series from GHK. Holds up to 40x 6mm BBs and comfortably takes Green gas for normal operation but is strong enough to take Red gas as well. Also work with Viper Tech, Inokatsu, and others WA system GBBR.