Airsoft Springs and Spring Guide – Everything you Need to Know

Generally, most of the stock spring guides are made of plastic with no ball bearings, that’s why the Spring Guide is the number one thing to upgrade in your AEG gearbox by using a metal-made spring guide having a ball bearing.

In this article, we will be covering all the basic info you need to know about spring guides and how much spring has to do with your airsoft gun’s FPS.

Let’s get started!

Airsoft Spring Guide Springs

What is Airsoft Spring Guide?

As the name suggests; the spring guide sits at the rear of the gearbox and underneath the spring to prevent it from bending and turning on itself inside the gearbox.

There are two things you should know about spring guides if you are going to purchase one.

  • Number one is its build material; Metal is clearly stronger than plastic so the metal-made spring guides along with a ball bearing are the tough and the best ones. The ball bearing at the base of a spring guide keeps the spring turning on itself instead of storing unnecessary tension inside.
  • The second thing you need to know about spring guides is their version that they should be used for: there are different spring guides out there in the market used in different versions of gearboxes. So if you have a version 3 airsoft gun, you will need to buy a version 3 spring guide for that, and so on.

For example, M4, M16, and SCAR have version 2 gearboxes while AK and G36 have version 3, etc., etc.

 

Read: Best Spring Airsoft Bolt Action Sniper Rifles – Top 7 Guns Reviewed

 

How important is a metal spring guide?

In AEG, even a strong plastic-made spring guide could break because of all the stresses created by spring. Or the plastic one would eventually break with time even if it performs well at the start.

It’s not compulsory to replace it with a metal one but it is recommended once you have opened up the gearbox as the spring guide is one of the easiest and cheapest parts to upgrade.

 

Airsoft Springs FPS Guide

Before you upgrade the spring for your airsoft gun, you will need to consider upgrading other parts inside the gearbox first. Spring plays a major role in changing the velocity of your airsoft gun.

The ball bearing spring guides help with the tension generated from the expansion and contraction of the spring, it also helps avoid piston breakage and improve the spring’s lifecycle.

 

Guarder Springs

Approximate shooting power of Guarder Springs: Varies by AEG

Guarder SP85 Spring: 280 – 290 Feet per Second (FPS) with 0.2g BBs

Guarder SP90 Spring: 290 – 300 FPS with 0.2g BBs

Guarder SP100 Spring: 320 – 330 FPS with 0.2g BBs

Guarder SP110 Spring: 350 – 360 FPS with 0.2g BBs

Guarder SP120 Spring: 380 – 390 FPS with 0.2g BBs

Guarder Sp130 Spring: 415 – 430 FPS with 0.2g BBs

Guarder SP140 Spring: 450 – 460 FPS with 0.2g BBs

Guarder SP150 Spring: 480 – 490 FPS with 0.2g BBs

Guarder SP160 Spring: 520 – 530 FPS with 0.2g BBs

Guarder SP170 Spring: 540 – 560 FPS with 0.2g BBs

SHS Springs

SHS springs have a tendency of shooting at high FPS than what is mentioned on its label. For Example, an M140 SHS spring would shoot much higher than the mentioned 450 FPS on its label.

Approximate shooting power of SHS Springs: Varies by AEG

SHS Spring M90: 270-280 FPS

SHS Spring M100: 300-320 FPS

SHS Spring M110: 350-375 FPS

SHS Spring M120: 380-415 FPS

SHS Spring M130: 430 FPS

SHS Spring M140: 450 FPS

SHS Spring M150: 480 FPS

SHS Spring M160: 510 FPS

SHS Spring M170: 540 FPS

Systema Springs

Approximate shooting power of Systema Springs: Varies by AEG

Systema Spring M90: 290 – 300 FPS using .20g BBs

Systema Spring M100: 340 – 365 FPS using .20g BBs

Systema Spring M120: 395 – 410 FPS using .20g BBs

Systema Spring M120S: 420 – 440 FPS using .20g BBs

Systema Spring M130: 420 – 430 FPS using .20g BBs.

Systema Spring M140: 450 – 460 FPS using .20g BBs.

Systema Spring M150: 470 – 490 FPS using .20g BBs.

Systema Spring M160: 500 – 550 FPS using .20g BBs.

PDI Springs:

Approximate shooting power of PDI Springs:

PDI Spring 100%: 290 – 300 FPS using .20g BBs.

PDI Spring 120%: 320 – 330 FPS using .20g BBs.

PDI Spring 140%: Estimated same performance as Systema M100 (340 – 365 FPS)

PDI Spring 150%: 350 – 365 FPS using .20g BBs.

PDI Spring 170%: 380 – 405 FPS using .20g BBs.

PDI Spring 210%: 415 – 430 FPS using .20g BBs.

PDI Spring 240%: 350 – 460 FPS using .20g BBs.

PDI Spring 270%: 470 – 490 FPS using .20g BBs.

PDI Spring 300%: 520 – 530 FPS using .20g BBs.

Prometheus Springs:

Approximate shooting power of Prometheus Springs: Varies by AEG

Prometheus Spring MS90SP: 300 – 315 FPS

Prometheus Spring MS100SP: 330 – 340 FPS

Prometheus Spring MS110SP: 370 – 390 FPS

Prometheus Spring MS120SP: 414 – 440 FPS

Angel Springs:

Approximate shooting power of Angel Springs:

120%: 317 FPS

130%: – 345 FPS

140%: 430 FPS

Top Power Springs:

Approximate shooting power of Top Power Springs:

150%: 380 FPS

170%: 410 FPS

190%: 465 FPS

KM Springs:

Approximate shooting power of KM Springs:

90M: 320 FPS

100M: 340 FPS

120M: 395 FPS

130M: 420 FPS

140M: 450 FPS

 

Do you need a scope for your airsoft sniper? Best Airsoft Sniper Scopes 2021 – 7 Amazing Scopes Reviewed

 

Process for changing the Spring

Changing the spring depends on the type of gearbox and the gun itself, it is different for different gearbox designs. Most of the modern airsoft guns have a pretty simple spring changing system where the spring can be removed or added from the back of the gun, and you won’t need to mess around with the gearbox.

The old version 2 gearbox guns generally require dismantling the gearbox first and then you would be able to change the spring.

We have attached a video for changing the spring of an airsoft rifle. However, you can check out YouTube for specific video tutorials.

What to do if you don’t get the right FPS?

The first thing you should keep in mind is that not all the springs are created exactly the same, and the second thing is that the FPS changes with time and use.

Now if you want to achieve somewhere close to your desired FPS:

  • Purchase a higher FPS spring
  • Take a cutter and cut down a coil from the spring
  • Sand it down to make the sharp edges smooth
  • Now, your spring should give a high FPS

 

Also Read: Best Cheap Airsoft Snipers 2021 – $40 to $200 [Top Rifles]

 

Where to buy?

You can buy an airsoft spring guide or your desired spring at any airsoft store in your vicinity or order from online platforms such as Amazon or Airsoft Station etc.

 

Conclusion

There you have it, a complete guide on airsoft springs and airsoft spring guides. We hope that we answered all your questions in this post? If so, please share it with your airsoft buddies.

Do you have any questions? Please ask them in the comments below

Happy Shooting 🙂

A Navy Seal veteran who has served multiple international tours to Somalia, Iraq, Syria, and Afghanistan. He is also an airsoft enthusiast who enjoys playing, sharing his knowledge and expertise of the vast airsoft realm.

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