Magazine is in good working condition. Does not leak. Features Include: Heavyweight, metal construction Uses standard 12g CO2 cartridges Manufacturer: KWC Compatibility: For KWC CYBERGUN SIGARMS SIG SAUER 4.5mm (.177 cal) GSR Gas Non-Blowback 1911 Air pistols Capacity: 21rds Gas Type: 12g CO2 cartridge Check my page to see if there is anything else you need! I will accept reasonable offers I will combine shipping on multiple orders when possible