Is It Bad to Leave CO2 in Your Airsoft Gun? Uncovering the Hidden Risks

If you’re an airsoft enthusiast, you’ve probably wondered whether leaving CO2 in your airsoft gun is terrible. Knowing the facts can help extend the lifespan of your gun and ensure its optimal performance. This post will briefly discuss the possible dangers of leaving CO2 in your airsoft gun.

Leaving CO2 in your gun puts constant pressure on the seals and valves, which can gradually lead to leaks. In addition, CO2 canisters that are stored in the gun for an extended period may cause the gun to lose power or accuracy when you use it. As a responsible airsoft user, you must be aware of these issues and take the necessary precautions to care for your gun.

So, is it wrong to leave CO2 in your airsoft gun? The answer is yes, especially if you want to maintain the performance and durability of your airsoft weapon. Regularly inspecting and maintaining your gun and removing the CO2 canisters after use can make a significant difference in the long run.

CO2 in Airsoft Guns

Let’s dive into the role of CO2 in airsoft guns and how it compares to green gas. This section will touch on gas and pressure, then compare CO2 and green gas.

Gas and Pressure

Gas plays a critical role in propelling the BBs in your airsoft gun. CO2 has a higher pressure than green gas, usually around 850 PSI, translating into a more powerful shot. However, this higher pressure can also cause faster wear and tear on your gun’s internals.

Maintaining your airsoft gun is essential to minimize the effect of gasses on its lifespan. Regular cleaning and lubrication will help, as will keeping an eye on pressure levels to ensure they stay within the recommended range for your weapon.

CO2 vs. Green Gas

Significant differences between CO2 and green gas could influence your choice. CO2 cartridges are generally more convenient and easy to store, but they come with a higher cost over time due to the need for frequent replacements.

Green gas, on the contrary, is a more cost-effective solution as it’s usually cheaper and can be refilled multiple times before needing a new container.

  • CO2: Higher pressure, more powerful shots, increased wear and tear, convenient storage, regular cartridge replacement
  • Green Gas: Lower pressure, more economical, requires proper storage, container refills

Considering these factors, take the time to assess your needs and preferences to determine which gas type will suit your airsoft gun best. Maintaining your weapon and paying close attention to pressure levels will extend its lifespan, regardless of your choice.

Impact on Performance

When discussing the impact of leaving CO2 in your airsoft gun, it’s essential to consider its effects on its performance.

Temperature and Efficiency

Temperature plays a crucial role in the efficiency of your airsoft gun. As the CO2 cartridge’s temperature decreases, so does the pressure inside.

This results in reduced performance and inconsistency. To maintain optimal efficiency, be mindful of your gun’s temperature and how it affects the CO2 release.

FPS and Shooting Experience


Your airsoft gun’s FPS (Feet Per Second) is directly impacted by leaving CO2 inside. Lower pressure means lower FPS, making your shots travel slower and less accurately.

Additionally, your shooting experience may be hampered by inconsistent shots and sluggish trigger responses. Releasing CO2 from your gun when not in use is beneficial to prevent these issues.

Maintenance and Longevity

Proper maintenance is vital to ensure the longevity of your airsoft gun and maximize its performance. This section will discuss the importance of maintaining seals, lubrication, and preventing gas leaks.

Seals and Lubrication

Good seals and lubrication are crucial for the efficiency of your CO2 airsoft gun. Over time, the seals can wear out and dry up, leading to decreased performance and potential gas leaks.

Regularly apply a thin layer of silicone oil on the O-rings and other rubber seals to maintain the seals. This helps to keep them flexible and in good condition. Avoid using petroleum-based oils, as these can cause the seals to degrade.

Preventing Gas Leaks

Gas leaks are common in CO2 airsoft guns but can be minimized with proper maintenance. Regularly inspect the valve and ensure that it is clean and undamaged. Replace any worn-out components as needed.

  • Consistency: Always use high-quality CO2 cartridges for your airsoft gun. The consistent pressure they provide helps prevent gas leaks.
  • Storage: When not in use, remove the CO2 cartridge from your gun, which helps relieve pressure on the seals and prolong their lifespan.
  • Inspection: Regularly check your gun for any signs of gas leaks, such as an abnormal smell, hissing sounds, or reduced performance.

Following these maintenance tips can help prolong your airsoft gun’s life and keep it operating at its best.

Storage and Refilling

Magazine and CO2 Cartridges

Always remove the magazine and CO2 cartridges when storing your airsoft gun to prevent leakage or damage. Emptying the magazine ensures the integrity of the feeding mechanism and helps prolong its lifespan.

For CO2 cartridges, it’s essential to release any residual gas before storage. Disconnecting the cartridge from the gun can help prevent seal degradation and potential leaks.

Proper Storage and Refill Practices

Store your airsoft gun in a cool, dry place away from direct sunlight and moisture. This will protect its components from damage and maintain optimum performance. Consider a carrying case or a padded gun bag for added protection.

When refilling your gun, use high-quality CO2 cartridges and lubricate the cartridge threads with a drop of silicone oil to ensure a proper seal. This will help prevent leaks and extend the life of your gun’s seals.

To refill the magazine, always use quality BBs and avoid overloading, as this can cause jamming or other feeding issues. Make sure to clean and maintain your gun regularly, ensuring smooth operation and a longer lifespan.


You can leave a CO2 cartridge in an airsoft gun, but not for an extended time. Leaving CO2 in your airsoft gun for a longer period can negatively affect the gun’s performance and longevity. Regular maintenance and proper storage are vital to keeping your airsoft gun in optimal condition.

Some key points to remember include:

  • Releasing CO2: Make a habit of releasing the CO2 after each use to prevent leaks and maintain the gun’s seals.
  • Maintenance: Clean and lubricate your airsoft gun regularly to ensure smooth operation.
  • Storage: Store your airsoft gun in a cool, dry place with the safety engaged to avoid accidents.

Following these guidelines will help protect your investment and keep your airsoft gun functioning effectively for years.

Frequently Asked Questions

Q. Is it bad to leave CO2 in my airsoft gun?

Yes! Leaving CO2 in your airsoft gun for extended periods can cause damage and put unnecessary pressure on the seals, leading to leaks or premature failure.

Q. How long can I safely leave CO2 in my airsoft gun?

It is best to remove CO2 cartridges after each use. If that’s impossible, avoid leaving them in for over a few days to minimize potential damage.

Q. What are the signs of a damaged seal?

Several signs indicate that your airsoft gun may be experiencing sealing issues. Loss of gas or pressure in the gun, inconsistent or poor shooting performance, and visible cracks or splits on the seals are all potential indicators of seal problems.

If you notice any of these signs, addressing them immediately is essential to prevent further damage to your airsoft gun. Checking and replacing worn or damaged seals can help ensure your gun functions appropriately and maintains its power and accuracy on the battlefield.

Q. How can I maintain my airsoft gun?

Regular maintenance, such as cleaning and lubricating, can extend the life of your airsoft gun. Make sure to follow the manufacturer’s recommendations for care and cleaning.

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