How to Put Green Gas in an Airsoft Gun? A Quick Guide for Beginners

If you’re new to the airsoft world, you may wonder how to appropriately fill your airsoft gun with green gas. Green gas is a popular propellant used in airsoft guns, providing a reliable and consistent power source to propel BBs toward their targets.

But how do you put green gas in an airsoft gun? This blog post offers a brief on how to correctly fill the green gas in your airsoft gun. We’ll review everything you need to know to get started, from picking the appropriate kind of green gas to comprehending the ideal filling process.

Read on to find out how to fill your airsoft gun with green gas like an expert, whether you’re a newbie or just searching for helpful advice!

Understanding Green Gas and Airsoft Guns

As an airsoft enthusiast, you want the best performance from your airsoft guns.

This section will discuss green gas as a propellant, compare it to CO2, and explore which airsoft gun platforms are suitable for green gas use.

Types of Green Gas

The CO2 and propane gases are other forms of airsoft gas. While propane is a less expensive alternative to green gas and can be filled into the magazine without an adapter, CO2 is a high-pressure gas typically used in airsoft guns that need more power.

To ensure optimum operation and safety, it is crucial to use a suitable type of gas for the particular model of airsoft gun.

Green Gas vs. CO2

Green gas is a common propellant for airsoft guns, typically made of propane mixed with silicone oil. This combination provides both power and lubrication for your airsoft gun.

Conversely, CO2 is another popular propellant in small, disposable cartridges. CO2-powered airsoft guns usually have a higher pressure, increasing power and range compared to green gas.

However, using green gas has advantages, such as easier maintenance and a more consistent shooting experience in various temperatures.

Additionally, green gas is usually cheaper and more environmentally friendly than CO2.

Airsoft Gun Platforms

When choosing an airsoft gun platform for green gas use, it’s essential to consider compatibility and performance. Most gas blowback (GBB) rifles and pistols can use green gas as a propellant, as it is designed to provide realistic recoil and consistent performance.

Non-blowback (NBB) airsoft guns also work with green gas, but their simpler design lacks realistic blowback action. These can be more gas-efficient and achieve higher velocities than GBB systems.

Not all airsoft guns are designed to handle the pressures of green gas, so it’s crucial to consult the manufacturer’s recommendations before using them as a propellant in your airsoft gun.

Preparing for the Gas Filling Process

Before filling your airsoft gun with green gas, gather all the required materials and take safety precautions.

Required Materials

Ensure you have everything you need for the gas-filling process by checking the following list:

  • Green gas can or propane with an adaptor
  • Silicone oil for maintaining o-rings and seals
  • Airsoft magazine with a functional valve
  • BBs for loading into the magazine
  • A well-ventilated area to work in

Safety Precautions


Using green gas, CO2, or propane in airsoft guns has some risks. Follow these safety precautions to ensure a smooth and safe experience:

  • Always work in a well-ventilated area when handling gas canisters, as the gas may be harmful if inhaled.
  • Keep all components, especially o-rings, and seals, well-lubricated with silicone oil to prevent leaks and ensure a proper seal during filling.
  • Be certain to cap off the green gas can or propane tank when not in use to prevent accidental gas leaks.

Step-By-Step Guide to Filling Green Gas

Step 1: Locating the Fill Valve

First, locate the fill valve on your airsoft gas magazine. It’s usually a small, round metal piece at the magazine’s bottom. Ensure the fill port is clean and free of debris before proceeding.

Step 2: Connecting the Gas Canister

Next, prepare your green gas container or propane adapter. Check the gas nozzle for any obstructions or damage. Align the gas nozzle with the fill valve on your magazine, ensuring a secure connection between the two.

Step 3: Filling the Magazine

With the connection secured, start filling the magazine by gently squeezing the gas container, allowing the green gas to flow into the magazine. Hold the container vertically and listen for a hissing sound, which indicates the gas is being transferred.

Once the hissing stops, the magazine is filled, and you can disconnect the gas container.

Maintaining Your Green Gas Airsoft Gun

Proper maintenance is essential for the optimal performance of your green gas airsoft gun. Following the steps below will ensure your gun’s longer lifespan and improve its overall performance.

Let’s dive into the essential sub-sections: Lubrication, Sealing, and Cleaning and Inspection.

Lubrication and Sealing

Applying the right lubricant to your airsoft gun is crucial for smooth operation. High-quality silicone oil lubricates the gas reservoir, O-rings, and seals. This prevents them from drying out and improves the overall gas efficiency of your weapon.

Avoid using petroleum-based lubricants, as they can cause damage to your gun’s components. To minimize gas leakage, apply lubricant regularly, especially after extended periods of disassembling your gun.

It’s good practice to lubricate your gun every month or after 2,000 shots, whichever comes first.

Cleaning and Inspection

Cleaning your green gas airsoft gun is essential for its performance. Remove any dirt, dust, and debris by wiping the exterior of your gun with a clean cloth. Use a cleaning rod to gently swab the barrel and prevent any buildup of debris that could affect your gun’s accuracy.

Regularly inspect your gun for signs of wear and tear, such as loose screws or damaged seals. Replace worn-out parts, such as O-rings or gas reservoirs, to ensure the longevity of your gun.

Don’t forget to check the gas system, including gas bottles, propane gas, and CO2 cartridges, to ensure proper functioning and prevent gas leakage.

Additional Tips for Improved Performance

Using the Right BBs

Your choice of BBs significantly affects your shooting performance. Opt for high-quality, polished BBs to ensure better accuracy and avoid jams. The appropriate weight for your green gas gun’s power level is crucial for effective targeting – for example, consider 0.20g – 0.25g BBs for most pistols.

Understanding Shooting Performance

Knowing how FPS (feet per second) and trigger response impact your experience can improve your overall shooting platform. A green gas gun with a faster FPS merits a more accurate shooting experience at longer ranges.

A quicker trigger response enhances your ability to hit the target; improving trigger performance can be achieved by using a lighter trigger pull and maintaining your gun’s internals.


  • Select quality BBs that match your green gas gun’s power requirements.
  • Understand the importance of both FPS and trigger response to improve shooting performance.

Troubleshooting Common Issues

This section will discuss troubleshooting common issues with your green gas airsoft gun, specifically focusing on gas leak fixes and addressing performance issues.

Gas Leak Fixes

Gas leaks are common in green gas airsoft guns, often caused by faulty valves or deteriorating o-rings. First, check the valve and o-rings for damage and replace them if needed.

  • Valve: Inspect the valve for signs of wear or damage; if you spot any issues, consider replacing it with a high-quality, compatible valve.
  • O-rings: Examine the o-rings for cracks or signs of wear. Replace them with new, appropriately sized o-rings to ensure a proper seal.

Addressing Performance Issues

Performance issues in gas blowback (GBB) various factors, such as low pressure or poor seals, can cause airsoft guns.

Proper maintenance and regular services are essential to keep your gun functioning at its best.

Here are some ways to address these issues:

  • Pressure: Ensure that the pressure in the CO2 chamber is within the recommended range for optimal performance. Releasing excess gas and refilling the chamber might fix any pressure-related issues.
  • Seals: Check the seals within your GBB system for proper placement and signs of wear. Replace any damaged seals to maintain the effectiveness of your gun.

Acquainting yourself with your airsoft gun and adhering to proper maintenance procedures will help you avoid common issues and ensure a high-quality performance for years.


Green gas, primarily made of propane and silicone oil, offers a cleaner, easier-to-use alternative to CO2 cartridges. It helps propel the BBs out of your airsoft gun with higher efficiency and consistency, making it a popular choice among seasoned airsoft players.

Refilling your airsoft gun with green gas is crucial for optimal performance and longevity. Following the steps will ensure a safe and effective reload, maximizing your enjoyment of the sport.

Key Points:

  • Always use high-quality green gas intended for airsoft guns.
  • Ensure your surroundings are free of potential hazards and distractions during refilling.
  • Keep a steady hand and maintain proper alignment while connecting the gas canister to the magazine fill valve.

With consistent practice, you’ll quickly master refilling your airsoft gun with green gas. This skill will enhance your airsoft experience and contribute to the community’s overall safety and camaraderie.

Frequently Asked Questions

Q. How do I fill my airsoft gun with green gas?

First, locate the gas fill valve on the magazine or gun to fill your airsoft gun with green gas. Then, shake the gas canister to mix the contents thoroughly and hold it upside down.

Insert the nozzle into the fill valve and press down firmly for a few seconds until you hear a hissing sound. Do not overfill the magazine or gun, as it can cause damage.

Q. How much green gas should I put in my airsoft gun?

The amount of green gas to put in your airsoft gun will depend on the magazine or gun’s capacity and the gas canister’s size. Generally, most magazines can hold 15-30 BBs and require 1-2 seconds of gas injection.

However, you should always refer to the manufacturer’s instructions for guidance.

Q. Can I use propane instead of green gas in my airsoft gun?

Yes! You can use propane instead of green gas in your airsoft gun. However, you will need a propane adapter to fill the magazine or gun, as propane cans do not have a nozzle suitable for airsoft.

Additionally, you must add silicone oil to the propane tank to keep your gun’s O-rings lubricated, as propane lacks the lubricants in green gas.

Q. Is it safe to put green gas in my airsoft gun?

Yes! Putting green gas in your airsoft gun is safe if you follow the manufacturer’s instructions and safety guidelines.

However, you should always wear eye protection when handling airsoft guns, including filling them with gas, and use caution when handling the canister or gun to prevent accidents.

Q. What do I do if my airsoft gun leaks green gas after filling it?

If your airsoft gun leaks green gas after filling it, check the fill valve to ensure it is tight and secure. The leak may be because of a faulty O-ring or other parts of the valve is tight.

In this case, you should contact the manufacturer for repair or replacement or take it to a professional airsoft technician for servicing.

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