CO2

CO₂ (carbon dioxide) is a commonly used gas propellant for airsoft and air guns. It operates on the principle of releasing compressed gas from a cartridge, which creates the pressure needed to fire BBs or pellets as it expands. You can purchase both CO₂ guns and CO₂ cartridges from us. CO₂ is mainly used in GBB pistols (Umarex), revolvers (Dan Wesson), and some long guns. It’s popular in replicas where a strong blowback or operation in cold weather is desired. On the other hand, for competitive or DMR-style play, more precise systems like HPA are often preferred.

CO₂ in airsoft

The most commonly used is the 12g cartridge, which is inserted directly into the magazine or the body of the gun. There are also larger 88g CO₂ cartridges used in some long guns or adapters for external gas setups. When the trigger is pulled, a valve opens and a small amount of CO₂ is released, creating pressure that fires the BB and in GBB replicas also cycles the slide for a blowback effect.

Difference between Green Gas and HPA

CO₂: Higher pressure (~800–900 psi), stable performance even in cold weather, but more wear on parts.
Green Gas: A mix of propane and silicone, lower pressure (~120 psi), gentler on replicas, but more sensitive to temperature.
HPA: Highly precise system with regulated pressure from an external tank, consistent performance, but requires a hose, regulator, and special magazine input.

Advantages of CO₂ guns

Higher performance: CO₂ delivers stronger shots even in cold weather.
Powerful blowback: GBB guns using CO₂ have a noticeably stronger recoil.
No need for warming: Operates reliably in winter conditions.
Easy cartridge replacement: Standardized 12g cartridges are readily available and easy to store.

Disadvantages of CO₂ guns

More wear on parts: High pressure accelerates seal and moving part wear.
Louder operation: CO₂ is generally louder than Green Gas.
Possible overpressure stress: Some replicas may require upgraded nozzles, valves, or metal components to withstand CO₂ pressure.
Non-refillable cartridges: Most CO₂ cartridges are single-use and cannot be refilled.