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HomeLower Your Fps: Top Tips for Reducing Airsoft Velocity

Lower Your Fps: Top Tips for Reducing Airsoft Velocity

To reduce fps in airsoft, modify the spring or use a weaker gas. This will lower the velocity of the bb when fired.

Airsoft enthusiasts often run into the problem of their guns shooting too hot for the designated field’s fps limit. This can lead to exclusion from games, equipment modification, or even permanent damage to the firearm if left unaddressed. Finding ways to decrease airsoft fps is a crucial skill for players, and there are a variety of methods to achieve this goal.

The two most common solutions are modifying the spring or using weaker gas. Both these methods will reduce the velocity of the bb when fired, thus lowering the overall fps. Read on for more information on how to reduce fps in airsoft firearms!

Lower Your Fps: Top Tips for Reducing Airsoft Velocity


Understanding The Physics Of Airsoft Velocity

Airsoft is a recreational sport that involves simulated combat scenarios with non-lethal weapons. One of the most crucial elements of airsoft is fps (feet per second), which is the measurement of the velocity at which the bb leaves the gun’s muzzle.

In this blog post, we will delve deeper into the physics of airsoft velocity, understanding fps, joules, the factors that impact fps velocity, and the impact of bb weight on fps velocity. Let’s begin:

Explanation Of Fps And Joules

  • Fps is short for feet per second and is the measurement of the velocity at which the bb leaves the gun’s muzzle. Simply put, it is the speed at which the bb travels through the air.
  • Joules, on the other hand, is the measurement of energy transfer when the bb makes contact with a target. It is essential to note that higher fps does not always mean higher joules. The weight of the bb also plays a significant role.

The Factors That Impact Fps Velocity

  • Spring tension is one of the most crucial factors that impact fps velocity. The spring’s tension decides the air compression that propels the bb, which ultimately determines how hard the bb will shoot.
  • The length of the inner barrel also affects fps velocity. A more extended inner barrel will provide additional space for the bb to accelerate before leaving, which ultimately results in higher velocity.
  • Other factors include the air seal, hop-up, piston head, cylinder head, nozzle length, and more.

Understanding The Impact Of Bb Weight On Fps Velocity

  • The weight of the bb is the most crucial factor that affects fps velocity. In general, heavier bbs travel slower but have higher energy transfer, while lighter bbs travel faster but with lower energy transfer.
  • Using heavier bbs is preferred for long-range shots as they are more stable in the air and less affected by wind resistance. However, they require higher fps to achieve the same distance as lighter bbs.
  • For short-range engagements, lighter bbs may be preferred as they provide a faster reaction time, but the users should be aware of their lower accuracy and energy transfer.

Understanding the physics of airsoft velocity is crucial for reducing fps in airsoft. It is essential to consider various factors such as spring tension, inner barrel length, air seal, hop-up, and more to control fps velocity. The weight of the bb plays a significant role in determining the airsoft gun’s velocity and energy transfer, and it is essential to choose the appropriate bb weight based on the user’s preferences and engagement distance.

Know Your Gun

Understanding Your Airsoft Gun’S Limitations

When it comes to reducing fps in airsoft, the first thing you need to consider is knowing your gun well. Your airsoft gun has certain limitations that you need to understand to ensure it functions smoothly and lasts longer. Here are some key points to keep in mind:

  • Check your gun’s velocity limits: Every airsoft gun has a velocity limit, which is measured in fps (feet per second). Check your gun’s manual or consult with an expert to know the limit for your particular airsoft gun.
  • Use the right bbs: Using heavy bbs may decrease the gun’s velocity while using lighter ones can increase it. Experiment with different weights to find which bbs work best for your gun and desired fps.
  • Keep your gun clean: Dirty guns tend to have a lower fps due to increased friction and reduced airflow. Make sure to clean your airsoft gun regularly to maintain its performance.

Internal Upgrades

One way to decrease fps in airsoft is by upgrading the gun’s internal parts. Here are some internal upgrades that you can consider:

  • Changing the spring: The airsoft gun’s spring is responsible for propelling the bbs out of the gun. Changing to a less powerful spring can help reduce the fps.
  • Upgrading the piston: A high-quality piston can decrease the fps by reducing the amount of air that goes out with the bb.
  • Installing a low-flow valve: The low-flow valve can regulate the amount of air that goes into the gun, thereby decreasing the fps.

Barrel Length And Bore Diameter

The barrel length and bore diameter of your airsoft gun can have a significant impact on its fps. Here are a few things to keep in mind:

  • The shorter the barrel, the lower the fps: Shorter barrels expel less air as the bb travels through, which ultimately results in a lower fps.
  • The wider the bore, the lower the fps: A wider bore causes the bb to rattle through the barrel, which leads to a lower fps.
  • Consider using a shorter, wider bore barrel: A shorter, wider bore barrel combines the benefits of both to provide a reduced fps while maintaining accuracy.

By understanding your airsoft gun’s limitations, making internal upgrades, and considering barrel length and bore diameter, you can easily reduce the fps in your airsoft gun and enjoy the game to the fullest.

Good Habits To Lower Your Fps

Maintaining your airsoft gun is essential, and it is vital to incorporate good habits that can help you lower your fps while playing airsoft. Here are some of the most important good habits to reduce your fps.

Using The Right Bb Weight

Choosing the correct bb weight can make a big difference in the fps that your airsoft gun produces. Generally, the heavier the bb, the lower the fps, and vice versa. Here are some tips you can follow when choosing the right bb weight:

  • Use heavier bbs. .30g or .32g bbs can help you reduce your fps.
  • Avoid using lightweight bbs that are less than .20g, as they can cause your gun’s fps to increase.

Regular Maintenance Of Your Airsoft Gun

Regular maintenance of your airsoft gun is crucial to ensure it works correctly and can reduce the fps. Here are some regular maintenance tips you can follow:

  • Clean and lubricate your gun regularly as dirty, grimy internals can cause fps to spike.
  • Check for any leaks or broken parts that may cause over pressurized guns.
  • Store your gun in a cool, dry place to prevent damage and to avoid exposing it to harsh elements.

Proper Hop-Up Adjustment

Setting the hop-up adjustment properly can help lower fps and improve accuracy. Here are some tips you can follow while adjusting the hop-up:

  • Start by adjusting your hop-up to neutral and testing your gun’s fps.
  • Gradually turn the hop-up up until you have achieved the desired fps.
  • Make sure that you test your hop-up adjustments regularly to ensure that fps does not spike.

By following these good habits, you can drastically reduce your fps and enjoy playing airsoft safely. Remember always to prioritize your safety and the safety of those around you.

Tips For Lowering Fps

Airsoft is a thrilling activity that attracts many enthusiasts worldwide. However, excessive fps (feet per second) can create safety hazards, making it crucial to take necessary measures to reduce it. There are various ways to do so, including installing a weaker spring, shortening the barrel length, adjusting your gun’s air compression, and using a high-flow valve in your gas-powered gun.

In this post, we’ll discuss some tips for lowering fps.

Install A Weaker Spring

  • Installing a weaker spring is a popular method that helps reduce fps in airsoft guns.
  • A spring with a lower tension will produce less pressure and, therefore, less velocity, leading to less fps.
  • If you have a gas-powered gun, you can replace the recoil spring or use a weaker gas.
  • Note that installing a weaker spring will lower your gun’s range and accuracy, so use it only if necessary.

Shorten The Barrel Length

  • Shortening the barrel length is another effective way to lower fps.
  • The longer the barrel, the greater the pressure buildup, resulting in higher fps.
  • Cut down the barrel length appropriately to match your desired fps level.
  • It’s crucial to ensure that the inner barrel length and the outer barrel length match to prevent complications.

Adjust Your Gun’S Air Compression

  • Air compression plays a significant role in determining the velocity of bbs in a gun.
  • Higher compression leads to higher fps, while lower compression results in lower fps.
  • Adjusting the compression ratio by changing air compression parts or altering the adjustment screws can help balance it and lower your gun’s fps.

Use A High-Flow Valve In Your Gas-Powered Gun

  • If you own a gas-powered gun, using a high-flow valve is a recommended way to lower fps.
  • The valve controls the flow of gas, and a high-flow valve decreases the volume, which reduces fps by decreasing the pressure buildup.
  • Ensure that the valve is correctly installed, and check your gun’s fps levels before and after installation.

Lowering fps in airsoft guns is crucial for safety purposes. You can do so by installing a weaker spring, shortening the barrel length, adjusting the air compression, or using a high-flow valve in your gas-powered gun. Remember to balance out any adjustments made to avoid compromising your gun’s performance.

Stay safe and have fun playing airsoft!

Frequently Asked Questions For How To Reduce Fps Airsoft

What Does Fps Stand For In Airsoft?

Fps stands for feet per second and is the unit of measurement used to determine the speed at which airsoft pellets are fired.

Why Is Reducing Fps Important In Airsoft?

Reducing fps in airsoft is important because it helps maintain safety on the field as well as ensures that players have a fair and enjoyable experience.

How Can I Reduce My Airsoft Gun’S Fps?

There are several ways to reduce your airsoft gun’s fps, such as changing the spring, using a shorter inner barrel, or using lighter weight bbs.

Can I Reduce My Airsoft Gun’S Fps Without Changing The Spring?

Yes, you can reduce your airsoft gun’s fps without changing the spring by using a shorter inner barrel or switching to lighter weight bbs.

Is It Legal To Modify An Airsoft Gun’S Fps?

In most places, it is legal to modify an airsoft gun’s fps as long as the fps stays within local and/or field regulations. It’s essential to check local laws and regulations.

Do All Airsoft Guns Need To Have Their Fps Reduced?

No, not all airsoft guns need to have their fps reduced. It depends on the type of airsoft gun and its intended use. However, it’s always important to check local regulations and field rules to ensure compliance.


Reducing the fps of your airsoft gun can be a tricky task, but it is essential for maintaining the safety of yourself and those around you. To achieve the desired results, you can use different methods such as changing the spring, altering the gearbox, or installing a lower power bolt.

However, it is crucial to bear in mind that the procedures differ depending on the type of gun you are using. The best way to go about this is to consult with an experienced airsoft technician or seek guidance online.

Remember that safety always comes first, and reducing the fps of your airsoft gun is an essential step in ensuring a safe and enjoyable airsoft game. By following the tips outlined in this article, you can significantly reduce the fps of your airsoft gun while boosting your chances of having a fantastic airsoft skirmish.



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