Cybergun 1911 CO2 Magazine, 16 Rds Colt pistol magazine Aluminum alloy construction Accepts standard 12 gram CO2 cartridges Fits Colt 1911 CO2 blowback airsoft pistol Item# CG18512 [PY-2537-5048] 16 round capacity Carrying spare magazines during intense airsoft wars means less time spent reloading your gun. This 17 rd CO2 magazine is made for use with the Colt 1911 CO2 blowback pistol. The magazine also includes a spare hex wrench to secure the CO2 cartridge for safe firing in the battlefield.