Airsoft gas magazines use compressed gas such as green gas,propane or CO2 which is stored inside a reservoir inside the magazine.
Green gas being the most popular as its mixed with silicon oil to lubricate the weapons internal seals while firing.
Gas Magazines
Sale
We Airsoft M16 ELR Gas STD/20R Magazine Black - NEM-5502
£34.99
£41.99
Sale
We Airsoft AK Magazine STD/30R Magazine Black - NEM-5104
£59.99
£69.99