Is CO2 or Green Gas Better for Airsoft? Unveiling the Top Choice!

Choosing the correct type of gas to power your airsoft gun is essential when it comes to airsoft. You might be wondering, is CO2 or green gas better for airsoft?

In this article, we’ll compare these two popular types of gas to help you make an informed decision.

CO2 is known for its consistency and power, making it a popular choice for airsoft players who require accurate, high-velocity performance. Green gas, on the contrary, is catered toward players who prioritize realism and a quieter gameplay experience. As a blend of propane and silicone oil, green gas guns often have less recoil and are less prone to damage.

Ultimately, your choice between CO2 and green gas will depend on your preferences and the airsoft experiences you enjoy.

Let’s look into the pros and cons of each option so that you can find the perfect fit for your airsoft adventures.

CO2 vs. Green Gas: Overview

In the airsoft world, the decision between CO2 and Green Gas can significantly impact your performance and experience on the field. Let’s take a closer look at each option and their respective properties.

Definition of CO2

CO2, or carbon dioxide, is a commonly used propellant in airsoft guns. It comes in small, pressurized cartridges inserted into your airsoft gun’s magazine or grip. CO2 provides a consistent and powerful source of propulsion, making it a popular choice for many airsoft players.

Definition of Green Gas

Green Gas, on the other side, is a blend of propane and silicone oil specially designed for use in airsoft guns. It is typically stored in a canister and filled into the gun’s magazine with the help of an adapter.

Green Gas is known for being more environmentally friendly and providing a more realistic shooting experience due to its lower pressure than CO2.

When choosing between CO2 and Green Gas, consider the following factors:

  • Performance: CO2 generally offers higher velocity and more consistent shots, while Green Gas provides a more realistic blowback action.
  • Reliability: CO2 can perform better in colder temperatures, but Green Gas is less likely to cause damage to your gun due to its lower pressure.
  • Maintenance: Green Gas contains silicone oil, providing lubrication during use, making it easier to maintain your gun compared to CO2.

Each type of propellant has its unique benefits and drawbacks, so carefully consider your priorities and preferences before making a decision.

Advantages and Disadvantages

CO2 Pros and Cons

One advantage of using CO2 in your airsoft guns is their consistent pressure and power. You will experience a higher velocity and stronger blowback, enhancing your overall performance.

Additionally, CO2 is less affected by temperature fluctuations, giving you a reliable shooting experience in various weather conditions.

However, CO2 has its drawbacks. The higher pressure can cause increased wear and tear on your airsoft gun, leading to a shorter lifespan or more frequent maintenance.

Additionally, CO2 cartridges tend to be more expensive and less environmentally friendly than green gas options.

Green Gas Pros and Cons

Green gas offers a more eco-friendly and cost-effective solution for airsoft enthusiasts. Using green gas helps minimize your environmental impact while providing a satisfactory shooting experience.

Furthermore, refilling green gas magazines is generally easier and more convenient than replacing CO2 cartridges.


On the downside, green gas is more sensitive to temperature changes, and its performance can be affected in extremely cold or hot conditions. Green gas offers less power and a weaker blowback compared to CO2, which could impact your overall performance on the field.

Performance and Efficiency

In this section, we’ll compare CO2 and green gas airsoft guns in terms of performance and efficiency. Let’s dive into the sub-categories: muzzle velocity, power output, and firing in various temperatures.

Muzzle Velocity

CO2 typically provides higher muzzle velocities than green gas, offering you an advantage in long-range engagements.

However, CO2 might also cause your airsoft gun to shoot over your field’s FPS limit. Green gas guns usually have lower FPS but are more likely to be compliant with field regulations.

Power Output

Power output directly affects the ability to launch heavier BBs efficiently. CO2 guns usually have higher power output, making them more suitable for heavier projectiles.

Green gas guns have a lower power output but are more efficient when using lighter BBs.

Firing in Various Temperatures

Green gas guns perform best in moderate temperatures, usually between 60-80°F. Colder temperatures can cause a decrease in performance as the gas’s pressure drops.

CO2 guns are less susceptible to temperature-related issues and perform well even in colder environments.

In summary:

  • Muzzle Velocity: CO2 often gives higher velocities; green gas usually complies with field limits.
  • Power Output: CO2 suits heavier BBs; green gas works best with lighter projectiles.
  • Temperature: Green gas guns perform best in moderate temperatures; CO2 is less affected by temperature changes.

Maintenance and Durability

Lubrication and Wear and Tear

Lubrication is crucial in maintaining their longevity for CO2 and green gas airsoft guns. The primary type is silicone oil, specifically designed for airsoft guns.

CO2 guns may experience more wear and tear due to their higher pressure. However, with proper lubrication and maintenance, you can extend the life of your CO2 airsoft gun.

Airsoft Gun Seals and Leak Prevention

Seals play a vital role in ensuring the efficiency of your airsoft gun. CO2 and green gas guns require proper maintenance for seals to prevent gas leaks and maintain optimal performance.

  • CO2 guns: Use thicker seals to withstand higher pressure, but they might wear out faster. Regularly check for leaks and replace seals as needed.
  • Green gas guns: Seals are generally more durable due to lower operating pressure but require periodic inspections and maintenance.

Proper care and maintenance are keys to keeping your airsoft gun functioning at its best, regardless of whether it uses CO2 or green gas.

Airsoft Guns Types and Compatibility

Airsoft sport requires specific guns for different users, and it’s essential to understand their compatibility with CO2 or green gas.

This will help you make an informed decision when choosing your airsoft weapon.


Airsoft pistols come in various models, and their power source varies between CO2, green gas, and electric. CO2 pistols often deliver higher velocity and are better suited for colder climates.

However, green gas pistols are quieter and easier to maintain.

  • CO2 Pistols: High power, better in cold weather
  • Green Gas Pistols: Quieter, easier maintenance


Airsoft rifles are mainly powered by CO2, green gas, or electricity. CO2 rifles deliver consistent performance and a more realistic shooting experience. Green gas airsoft rifles are known for their ease of use and require less maintenance than their CO2 counterparts.

  • CO2 Rifles: Consistent performance, realistic shooting
  • Green Gas Rifles: User-friendly, low maintenance

Electric Guns

Electric airsoft guns, or AEGs (automatic electric guns), use batteries as their power source. AEGs have versatile performance traits and seamlessly switch between semi-automatic, automatic, and burst firing modes.

These guns don’t rely on gas canisters, but frequent battery charges or replacements are required.

  • AEGs: Versatile performance, battery-powered
  • Power Source: Battery replacement or recharge

Magazines and Gas Systems

As an airsoft enthusiast, understanding the different types of magazines and gas systems is essential to choose the best option for your gameplay. This section will discuss magazine types, capacities, propellant systems, and their components.

Magazine Types and Capacities

Magazines come in two main types: standard and high-capacity. Standard magazines hold a modest number of rounds, offering a more realistic airsoft experience. Their capacity usually varies between 30 to 120 rounds.

On the contrary, high-capacity magazines can store more rounds – typically around 300 to 500. They often feature a winding mechanism for continuous feeding, which can be a great asset during intense airsoft battles.

Propellant Systems and Components

In airsoft, three standard propellant systems are prevalent: CO2, green, and red. CO2 is stored in canisters, which are easily replaceable and compatible with a wide range of airsoft guns. However, its high pressure can sometimes harm sensitive internals.

Green gas is a mix of propane and silicone oil, and it’s a popular choice due to its lower pressure and widespread availability. While canisters can come in various sizes, it’s crucial to maintain and lubricate your gun more frequently when using this gas.

Red gas is similar to green gas, featuring a slightly higher pressure. However, checking your gun’s compatibility before using this propellant is essential, as it may not be suitable for all airsoft guns.

Always ensure correct nozzle and valve combinations for smooth and efficient functioning.

Cost and Affordability

When it comes to the price of CO2 and green gas for airsoft, there are several factors to consider. First, let’s discuss the cost of the cartridges themselves. In general, CO2 cartridges are more affordable than green gas canisters.

However, green gas may be advantageous when considering the cost per shot. Since green gas canisters usually contain more gas, they can provide more shots per canister compared to CO2 cartridges. This means that, in the long run, green gas may be more cost-effective.

  • CO2 Cartridges: More affordable upfront.
  • Green Gas Canisters: This may provide more shots per canister, leading to a lower cost per shot.

When considering your airsoft setup, it’s essential to weigh the affordability of both gas types. Remember that not all airsoft guns are compatible with CO2 and green gas, so be sure to check your gun’s compatibility before making a decision.

Ultimately, the choice between CO2 and green gas will come down to your preferences, budget, and the type of airsoft gun you have.

Gameplay and Field Regulations

Indoor and CQB Games

Indoor and CQB (Close Quarters Battle) airsoft fields typically have lower FPS limits because of the close engagements and confined spaces. This helps ensure player safety and encourages using gas-powered airsoft guns, especially those that utilize CO2, as they offer more consistent performance in these environments.

To comply with indoor field regulations, ensure your gun operates below the required FPS limit.

Outdoor and Field Games

Outdoor airsoft fields usually have higher FPS limits as players engage in longer-range battles with more open spaces. This allows for using CO2 and green gas airsoft guns, as both types can achieve higher FPS ratings.

However, it’s essential to consider the field’s specific FPS requirements, as well as the weather conditions, as green gas performance may be affected by temperature changes.

FPS Limits and Chronographs

Chronographs are used at airsoft fields to measure your gun’s FPS, ensuring compliance with the field’s safety regulations. Most fields require you to Chrono your gun before gameplay, and they’ll provide the necessary tools for you to do so.

It’s crucial to know your gun’s FPS and adhere to each field’s limitations, as exceeding them may result in penalties or ejection from the field.

  • Indoor fields typically have FPS limits ranging from 300 to 350 FPS
  • Outdoor fields often have limits between 400 to 500 FPS, depending on the style of gameplay
  • Remember always to follow field regulations to ensure the safety of you and other players

Realism and Blowback Action

When it comes to realism in airsoft, the blowback action plays a significant role in enhancing your gameplay experience. Blowback guns offer a more authentic feel by simulating the movement and recoil of real firearms.

Choosing between CO2 and green gas can significantly impact your airsoft weapon’s blowback action and overall realism.

CO2-powered airsoft guns are well-known for providing a more robust and snappier blowback action. As a result, when you use a CO2-powered gun, you may notice a sharper and more forceful sensation in your hands, bringing your gameplay closer to real-life firearms use.

On the contrary, green gas-powered airsoft guns offer a more gentle and smoother blowback action. This can contribute to easier follow-up shots and more accurate aiming during rapid-fire situations.

However, the green gas blowback may feel less realistic than CO2 due to the reduced force and intensity.

In summary:

  • CO2: Stronger, snappier blowback action for enhanced realism
  • Green Gas: Softer, smoother blowback action for better control and accuracy

Ultimately, the preference for either CO2 or green gas regarding realism and blowback action depends on your gameplay style and expectations for authenticity during airsoft matches.

Additional Considerations for Beginners

As a beginner in airsoft, CO2 and green gas are viable options for your airsoft guns. However, there are some factors to consider when making your choice.

CO2 cartridges typically have a higher gas capacity and can perform better in colder temperatures, and they tend to offer more consistent performance, which can benefit novice players.

Conversely, green gas is more environmentally friendly and usually easier to handle. It comes in a canister that you can simply refill your magazine with.

  • Weather: CO2 might be more suitable in colder climates because it performs better in low temperatures.
  • Cost: Green gas canisters are generally more cost-effective in the long run, whereas CO2 cartridges can become expensive with frequent use.
  • Maintenance: Green gas contains silicone oil, which helps with lubrication and maintenance, making it more beginner-friendly.

Both options have advantages, and understanding each one’s characteristics will help you select the ideal option for your airsoft experience.


Ultimately, choosing between CO2 and green gas for your airsoft gun depends on your preferences and requirements. Both propellants have advantages and disadvantages, and it is crucial to consider factors like temperature, ease of use, and performance when deciding.

CO2 advantages:

  • Higher FPS
  • Works better in cold weather
  • More compact cartridges

Green gas advantages:

  • More environmentally friendly
  • Easier to refill
  • Quieter operation

Ultimately, weigh the pros and cons of each propellant and select the one that best suits your airsoft needs. Remember, a well-informed decision will enhance your overall airsoft experience.

Frequently Asked Questions

Q. Is CO2 or green gas better for airsoft?

Both CO2 and green gas have their advantages and drawbacks. CO2 typically provides higher FPS, but green gas offers more consistent performance and is more environmentally friendly.

Q. Which one is more cost-effective?

Green gas tends to be cheaper in the long run, as CO2 cartridges must be replaced more frequently. However, your choice should depend on your personal preference, performance requirements, and budget.

Q. Are there any compatibility issues between the two gases?

Yes, there are. Some airsoft guns are specifically designed for CO2 or green gas use. Always consult your airsoft gun’s manual to ensure proper compatibility and performance.

Q. How should I store these gases?

Proper storage of airsoft gun propellants is essential to ensure their longevity and functionality. For CO2 cartridges, it is recommended to store them in a cool and dry location, away from direct sunlight.

The same goes for green gas canisters, which should also be kept in a cool and dry area, away from heat sources and direct sunlight.

This will help maintain these propellants’ quality and effectiveness and prevent potential safety hazards from improper storage.

Q. Can I use propane instead of green gas?

Yes, some airsoft players use propane as an alternative to green gas. You will need a propane adapter and silicone oil for proper usage and maintenance. But remember, propane has a strong odor and may not be ideal for indoor play.

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