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Differences in Airsoft Gas Types: HFC, Green Gas, Red Gas, and CO2

Airsoft enthusiasts all over the world often face a critical choice: selecting the right gas for their gas-powered guns. Each type of airsoft gas—HFC, green gas, red gas, and CO2—features unique characteristics. These characteristics can significantly affect performance, maintenance, and costs. Understanding the differences can help you make the right decision for your playstyle and budget.

Understanding the Basics of Airsoft Gas Types

Gas-powered airsoft guns rely on compressed gases for propulsion. Each gas type varies in composition, pressure levels, and environmental compatibility. Here’s a quick rundown of the most common airsoft gases:

• HFC (Hydrofluorocarbon): A newer, eco-friendly option and the most common in Japan.
• Green Gas: The standard option for most airsoft players abroad.
• Red Gas: A high-pressure variant for specific use cases abroad.
• CO2: A versatile and high-power choice.

Hydrofluorocarbon (HFC)

HFC is a relatively recent addition to the airsoft market and has gained traction due to its eco-friendly properties. As a refrigerant-based gas, it is less harmful to the ozone layer and provides a safer alternative to older propellants.

Here in Japan this is the normal gas you will find.

Pros

• Environmentally friendly with low global warming potential.
• Compatible with most green gas-compatible guns.
• Consistent pressure, even in varying temperatures.

Cons

• Slightly more expensive than traditional green gas.
• Less readily available in some regions.
• Small containers, usually 400 – 460ml

Cost
HFA typically costs around ¥2,000–¥2,600 per canister.

CO2

CO2 is a powerhouse among airsoft gases, offering unparalleled pressure and consistency. It is often delivered in small cartridges, making it easy to transport and use.

This is the improved option for us Japanese players, but the variety of guns is limited. Sun Project began their own “Green Gas” canisters. This provided a safe way for Japanese airsoft players to have an external high power source. They no longer have to worry about refilling an HPA tank.

Pros

• Consistent performance in all weather conditions.
• High pressure provides greater range and velocity.
• Universally available in most airsoft stores.

Cons

• Can increase wear and tear on internal components.
• Requires a CO2-compatible gun.

Cost
A single 12g CO2 cartridge costs ¥70–¥100, with bulk packs offering discounts. A tank can be bought for about ¥1000

Green Gas (Illegal in Japan)

Green gas is widely used among airsoft gases internationally. It is favored for its balance between performance and ease of use. It consists primarily of propane. Silicone oil is mixed with it to lubricate the internal components of gas-powered guns. This helps to prevent wear and tear on key parts like seals and valves. The moderate pressure generated by green gas is suitable for a variety of gas blowback (GBB) guns. It offers reliable performance in both cool and warm climates. The gas expands and contracts in response to temperature changes.

However, despite its widespread use abroad, green gas falls under Japan’s high-pressure gas laws. These regulations classify green gas as a pressurized gas. It contains propane. It can be refilled into airsoft gun magazines under high pressure. In Japan, this makes the use of green gas for recharging magazines illegal. It is considered a form of high-pressure gas cylinder under the High-Pressure Gas Safety Act. The act regulates the handling, storage, and transportation of gases with high-pressure properties. This ensures safety, given the potential risks of leaks, explosions, or accidents in case of mishandling.

Pros

• Includes lubrication for internal gun components.
• Stable performance in colder temperatures.
• Much larger containers, usually 1000ml

Cons

• Not suitable for high-pressure applications or heavy-duty guns.

Red Gas (Illegal in Japan)

Red gas is a high-pressure variant of green gas, designed for advanced players and heavy-duty guns. It’s particularly effective for use in colder climates where standard green gas might falter. The power output of red gas is significantly higher and highly combustable, so must be handled with care.

However, it’s worth noting for us Japanese players that Red Gas is illegal in Japan and cannot be used for airsoft.

Pros

• Higher pressure ensures superior performance in cold conditions.
• Suitable for metal slide guns requiring extra power.
• Large containers, 1000ml

Cons

• Can damage guns not rated for high pressure.
• Expensive and less widely available.

Choosing the Right Gas for Your Needs

Selecting the right gas boils down to several factors:

• Budget: Green gas canisters are the most cost-effective choice for casual players outside of Japan wheras for us inside Japan, HFC gas is the best option.
• Climate: Opt for CO2 in colder climates to ensure consistent performance.
• Gun Compatibility: Check your gun’s manual to ensure compatibility with high-pressure gases like red gas or CO2.

Conclusion

You should understand the differences between airsoft gas types like HFC, green gas, red gas, and CO2 as well as laws in your are surrounding the storage and use. This knowledge is crucial for optimizing your gameplay. Each gas type offers unique advantages and drawbacks, catering to different performance needs and budgets. Whether you’re a beginner looking for affordability, or an experienced player seeking maximum power, there’s an option tailored for you.