WE HI-CAPA Series Series CO2 26 Round Magazine. Brand new design, same size and demension as a WE 5.1 Hi Capa green gas magazine. Fits a 12gram CO2 cartridge, magazine fits all Airsoft Baby 3.8 Hi-Capa, 4.3 Hi-Capa, and all 5.1 Hi-Capa including Dragon models. No modifications required for use in all WE green gas blow pistols. New Design Same Size as Green Gas Magazine 26rd Capacity Fits 1-12gram CO2 Cartridge 12gr CO2 cartridge provides from 45 to 55 shots. CO2 bleeds out from the barrel when a small amount of CO2 left in the cartridge.