Looking for the perfect sniper spring upgrade for your airsoft rifle and stay within the field limits? The Rapax 2.8 J spring is your answer. Trusted by thousands of airsoft sniper players, this sniper upgrade spring is compatible with most popular sniper rifle models, it will give you consistency, reliability, and compliance with international regulations, especially the US airsoft sniper field limit.

Why Choosing Rapax 2.8 J Spring?

1. Wide Compatibility

Our 2.8 J spring is made for seamless integration with popular sniper replicas, including:

• Silverback SRS spring, TAC41 spring
• Novritsch SSG10 spring, SSG11 spring and SSG96 spring
• Modify sniper models

2. Internationally Compliant (Made for the US Airsoft Sniper Field Limit)

This spring meets the 2.8 Joule sniper field limit for countries like the USA, Canada, Spain, Austria, and more. With this spring, you can confidently play within field limits wherever you go.

3. Easy Adjustment with Spacer

If your Joule output is under 2.8J, simply use the included 4mm power-up spacer to gain more power.

4. Proven Durability

Crafted in Europe from the highest-quality spring wire, our 2.8 Joule spring:

✔ Delivers over 10,000 shots without losing power.
✔ Features an electroplated finish for rust resistance and reduced friction, giving you smoother performance and longer spring lifespan.

Optimized for 2.8 Joule Limit (with 0.48g BBs)

The Rapax 2.8 J spring has been tested with heavy BBs and with:

• Silverback SRS, Tac41 spring (16″ barrel)
• Novritsch SSG10 spring (430mm barrel)

🔹 Note: Joule output may vary based on barrel length, piston weight, and hop-up settings.

Ready for 2.8J Airsoft Sniper Field Limit

• If you have more Joules then your field’s Joule limit, you can trim the coils without damaging the spring’s integrity.
• If you have less then you need, just add a spacer that comes with the spring.

Installation and Maintenance Tips

• Use heavy BBs for accurate Joule measurements.
• Adjust the hop-up for the best flight path before testing energy levels.
• Apply lithium or thick grease to the spring and guide to reduce “twang” sound and improve performance.

Why It’s the Best Sniper Spring Upgrade

✔ Fits universally: APS2 13mm outer diameter ensures compatibility with top sniper rifles.
✔ Customizable power: Includes a 4mm spacer for precise adjustments.
✔ Enhanced gameplay: Eliminates guesswork with easy installation and tuning.
✔ Reliable performance: Tested and trusted by airsoft players worldwide.

Discover More

Visit the Useful to Know page for expert tutorials on:

Upgrade Your Airsoft Rifle Today!

The Rapax 2.8 J spring is the ultimate sniper spring upgrade for precision, and performance.

➡ Buy now and experience the difference trusted by airsoft players around the globe!

Frequently Asked Questions (FAQ) – Rapax 2.8 J Spring

1. Is the Rapax 2.8 J spring compatible with my sniper replica?

Probably Yes! The Rapax 2.8 J spring features a universal 13mm outer diameter (APS2 standard), making it compatible with most sniper rifles that use standard springs. While tested with Silverback, Novritsch, and Modify rifles, it should fit other models with similar specifications. Check your rifle’s manual or contact us for confirmation.

2. How do I use the included 4mm spacer to adjust power?

If your rifle’s Joule output is below 2.8 Joules, the 4mm spacer can help to increase FPS. Insert the spacer between the spring and spring guide during installation..

3. Can I trim the spring if it exceeds my field’s limit?

Yes! You can safely trim the spring to lower power output. Cut small sections (1 coil at a time) and test Joule output after each adjustment. Follow our spring trimming tutorial to maintain performance and durability.

4. How does inner barrel length affect performance?

Longer barrels generally increase Joule output, while shorter barrels may reduce it. The Rapax 2.8 J spring has been tested with 16″ (Silverback SRS) and 430mm (Novritsch SSG10) barrels. Most used barrel lengths are 16″-430mm.

5. What type of grease should I use, and how often?

For optimal performance, use lithium or thick bearing grease. Apply a thin layer to the spring and spring guide every 2000 shots or if you notice increased noise (“twang”). Avoid excessive greasing, as it can attract dirt.

6. How much FPS will I get with this spring?

Depending on your rifle setup, you should get around 480fps with 0,2 BB, and 2,8 Joules with 0,45, so you get more power with heavy bb.

7. What’s the difference between FPS and Joules?

✔ FPS (feet per second) measures BB speed.
✔ Joules measure energy
✔ Heavier BBs lower FPS but increase Joules/Power.

8. How durable is the Rapax 2.8 J spring?

Made from high-quality European spring wire, it reliably delivers over 10,000 shots with proper maintenance.

9. What BB weight is recommended for optimal performance?

For accurate Joule measurements and stable flight, use 0.45g BBs or heavier. Lighter BBs will reduce accuracy and effective range.

Still have questions? CLICK HERE

📩 Contact our support team or explore our video tutorials for expert guidance!

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The Rapax HULK High Velocity Spring is a reliable, high power airsoft sniper spring trusted by thousands of players. Designed to be used in Silverback SRS, Tac41, Novritsch SSG10, 24, 96, Modify Scout and many more, it’s the perfect upgrade for those seeking power, precision, and durability.

Features of the Rapax HULK high power airsoft spring

1. High Power Output
   • Produces 3.5J with 300mm barrels and up to 4.9J with long barrels. FPS with 0,2BB is from 500-650FPS, depends on a barrel length.
   • Power (Joule) ratings are tested using heavy BBs for precise results.
2. Universal Compatibility
   • With a 13mm outer diameter, the Rapax HULK spring is designed to fit into all popular airsoft sniper replicas.
3. Easy Operation
   • Experience a lighter bolt pull for less effort and more joules.
   • Outperforms standard options like the Silverback 150N spring in FPS and joule output.
4. Durability and Longevity
   • You will forget when you bought it, and probably you will use it in next project.
   • Ensures minimal FPS and joule loss over time, even with heavy use.
5. Silent Performance
   • Reduces the “twang” sound common in airsoft sniper replicas..
6. Customizable Power
   • If your spring exceeds field limits, safely trim coils without compromising integrity.

Versatile Compatibility

With a 13mm outer diameter, the Rapax Hulk spring is compatible with all popular airsoft sniper rifles.

• Silverback TAC41, SRS
• Novritsch SSG10, Novritsch SSG11, SSG96
• Modify Scout
• Upgraded VSR10 and other clones
• And many more!

Pro Tips for Best Performance

• Adjust your hop-up for optimal BB flight path before measuring joules.
• Use lithium grease for quieter operation and smoother handling
• Understand how factors like piston weight and barrel length influence speed and power (FPS and Joules).
• Not sure which Rapax airsoft spring is right for you? Visit this guide 

Crafted with Excellence

Rapax HULK high power airsoft spring are handmade in Europe using the highest-quality materials. With consistent results and enhanced durability, Our springs are ideal for airsoft players looking to upgrade their spring sniper rifles.

Learn More and Connect

• Visit the Useful Videos page for tips on optimizing your spring performance.
• Join the Rapax Facebook Group to connect with other enthusiasts and share your experiences.

Order Your High Power Airsoft Spring Today

Ready to take your airsoft game to the next level? Explore the Airsoft Springs Shop and get the Rapax HULK high power airsoft spring for unmatched power, precision, and performance. Made for airsofters by airsofter.

Our 3+J Airsoft Spring is already proven to be one of the first choice to boost the power and precision. This premium airsoft sniper upgrade spring offers higher FPS, greater Joules, and all of that with easier bolt pull compared to other brands.

Why Our 3+J Airsoft Spring is the Best Upgrade spring for airsoft sniper

• Consistent and Reliable FPS: The Rapax 3+J airsoft spring (with heavy bb´s) delivers:
  • 2.8J (300mm-G-Spec) -under 500fps with 0,2bb
  • 3,4J for standard 16″ (420mm barrels)- over 520fps with 0,2bb
  • up to 4J in long barrels. FPS and Joules may vary based on your setup (e.g., barrel length, piston weight).
• Compatibility: This 3+J airsoft spring fits perfectly in all popular models (mostly all or them use 13mm springs).
• Enhanced Power with Eeasier Pull: With the Rapax 3+J, you increase airsoft sniper FPS and Joules compared to standard springs. Not only does it give you higher power, but it also makes the bolt pull smoother and easier, compared to competitors. Less effort & more power.

Airsoft Upgrade Compatibility

The Rapax 3+J airsoft spring is perfect Silverback SRS upgrade or Tac41 upgrade and it will perfectly upgrade Novritsch SSG10 or Modify Scout or any airsoft sniper gun with 9mm spring guide. It is also a perfect fit for aftermarket heavy pistons as Stalker Scorpion, Wasp, Edgi.

Built to Last – Over 10,000 Shots

• Long-Lasting Performance: Thanks to our advanced tempering process, you won’t experience significant FPS or Joule loss over time.
• Premium Construction: Rapax springs are handmade in Europe using the best materials, ensuring reliable performance and durability. These springs provide a long lifespan, even with heavy use.

How to Optimize Your Rapax Spring Performance

• Hop-Up Adjustment: For accurate measurements, always adjust your hop-up using heavy BBs (not 0.2g). Proper adjustment ensures real J/FPS output and optimal flight path and trajectory.
• Lubrication: Apply lithium grease or a thick grease to the spring and spring guide for better performance and reduced wear.
• Power Adjustability: Need a lower FPS? You can safely cut 3J airsoft spring coils without compromising its integrity, and in this video you can find how to.

Not sure which Rapax spring is right for you? CLICK HERE

Upgrade Your Sniper Rifle Today with the 3+J Airsoft Spring

• Higher FPS & Joules: Get more power with an easier pull.
• Durable: Tested to last without power loss over time.
• Silent: Reduces the annoying twang sound for stealthier shots.

Order Your Rapax 3+Joule Spring Now and take your airsoft sniper rifle’s performance to the next level!

Our similar product from RMS airsoft spring series -RMS 3+J

Join our Facebook community for tips

 Watch setup tutorials on YouTube

Upgrade your airsoft sniper rifle with the Rapax 2+J sniper spring, trusted by thousands of satisfied users worldwide. Designed for popular models like the Silverback Tac 41, SRS, Novritsch SSG10, SSG11, Modify Scout, and many more, this spring ensures enhanced performance and reliability.

Why Choose Rapax 2+J sniper spring?

• Universal Fit: With a 13mm outer diameter, it fits perfectly in almost all sniper rifle replicas.
• Easier pull : Enjoy a lighter bolt pull while achieving higher FPS compared to standard springs you used before.
• Made for UK airsoft sniper limit: you should be safe to use it in any field in the UK
• Silent Operation: Reduces the “twang” sound common in airsoft sniper replicas.
• Proven Performance: Achieves consistent results of 2+ Joules in standard setups, with J varying by barrel length.
  • Power Range: From 1.9J (300mm barrel) to 2.8J (longest barrels).
  • Fps with 0,2BB will be around 450-500 fps for standard barrels.

Compatibility

Rapax 2+J airsoft upgrade sniper spring is compatible with: Silverback Tac41, Silverback SRS, Novritsch SSG10, SSG11, 24, Modify Scout ect, and it is perfect fit for aftermarket heavy pistons as Stalker Scorpion, Wasp, Edgi.

How to Optimize Your Rapax 2+J Sniper Spring Performance

• Hop-Up Adjustment: For accurate measurements, always adjust your hop-up using heavy BBs (not 0.2g). Proper adjustment will give you real J/FPS output and optimal flight path and trajectory.
• Lubrication: Apply lithium grease or a thick grease to the spring and spring guide for better performance and reduced wear.
• Power Adjustability: Need a lower FPS? You can safely cut the Rapax 2+ spring coils without compromising its integrity.

High-Quality Materials and Longevity

• Premium Wire: Made from top-grade spring wire for extended durability.
• Tempering Process: Specially treated for a long lifespan with minimal FPS/Joule loss over time.

Experience the difference with Rapax 2+J sniper spring – delivering advertised power, easier pull, and longevity for your airsoft sniper rifle.

Upgrade your airsoft sniper rifle with the Rapax 2+J sniper spring – the perfect blend of power, easy pull, and durability made by airsofter for airsofters.

Frequently Asked Questions

Q: Will the Rapax 2+J work with my Novritsch SSG10 or new SSG11?
A: Yes! It will work excellent as Novritsch SSG10 and SSG11 as upgrade spring..

Q: Will this spring work in Silverback models?
A: Yes! This spring is often a first choice to upgrade TAC-41 spring, or SRS spring.

Q: Is Rapax 2+ Easy pull too long for my cylinder ?
A: Short answer is NO. It is perfect upgrade airsoft spring for Novritsch, Silverback, Modify and many more.

Which Rapax spring should I choose? CLICK HERE

Order Your Rapax 2+J Sniper Spring Now

To get more knowledge about Rapax airsoft springs you can look this YT video where all our sniper springs are tested with short barrel Tac 41

Visit our Facebook group to get more info or to ask a question.

RMS 4j spring is made to be used in Silverback, Novritsch, Modify and many other sniper rifle replicas.

RMS stands for Rapax Modular spring. One of the best upgrade sniper spring. 

Rapax airsoft springs are 13mm outer diameter, so they fit all above mentioned sniper replicas.

Rapax Modular Spring series are made with same quality standards as the Light Pull series springs. With durability and quality there made to give you the best sniper experience. The difference from light pull series is in its length (considerably shorter than light pull series), slightly harder pull, but increased silent shots. Also RMS springs are electrically coated to prevent rust which gives a more smooth operation on the spring guide.

RMS 4J spring come with two PETG printed 4mm spacers included in package, so you can adjust FPS/J according to your field limits.

Results : RMS 4J spring gives between 3.5J (with 300mm barrels) to 4.9J for longest barrels.

All springs are the same length, use the same material, have the same number of coils, ect.

Spring wire used for Rapax RMS 4j spring production is of the highest quality spring wire, ensuring a prolonged period of usage compared to other springs.

Tempering process for RMS 4j spring is made in a way to guarantee a long lifetime and very small FPS/Joule loss over time.

Springs are made in tight tolerances regarding diameter, they prevent the “twang” sound in airsoft sniper replicas.

Note: G-spec, the one with 300mm barrel always need harder spring to achieve same J/FPS than longer barrels.

You can see our HULK 4+J spring from lightpull series https://rapaxsprings.com/product/rapax-rapax-hulk-high-velocity-spring/

You can also visit “useful videos” page to get more knowledge about Rapax springs and other topics. For example, most useful for many would be the importance to find out how weighted pistons work.

Rapax Shop

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Looking for a high-performance airsoft spring for your airsoft sniper rifle upgrades? The Rapax RMS 3+J Upgrade Spring is an excellent choice if you need a spring for Silverback TAC-41, Silverback SRS, Novritsch SSG10, Modify Scout, TAC41, upgraded VSR10, and other popular sniper rifle replicas.

Why Choose the Our RMS 3+J Spring?

• Perfect Fit for all popular airsoft sniper rifles:
  With a 13mm outer diameter, the Rapax RMS 3+J spring fits perfectly into the Silverback SRS, TAC41, Novritsch SSG10/24/96, Modify Scout, and similar models. Whether you’re fine-tuning or upgrading your sniper rifle from stock, RMS 3+j Upgrade Spring from Rapax Modular Springs series is a reliable choice.
• You get what you need::
  With this spring you will get 3+ Joules of power with heavy bb, and most used 420-430mm inner barrels, That´s around 390 FPS with 0,48. Longer barrels will get more Joules and FPS.
• Easy Adjustments for FPS and Joules:
  The Rapax Modular Spring (RMS) offers flexibility for airsoft sniper tuning. It includes two 2x4mm PETG spacers, enabling you to adjust the FPS or Joules to comply with your field’s specific limits or to maximize your setup.
• Quieter Shots with Enhanced Power:
  Compared to lighter pull springs, the RMS 3+J Upgrade Spring delivers a quieter shooting experience. It’s designed to perform well with weighted pistons, making it a great addition to advanced sniper setups.
• Built for Durability:
  Rapax springs are made from high-quality steel wire and feature an electrical coating for rust prevention. This ensures smoother operation on your spring guide and extends its performance to over 10,000 shots without power loss.

More Reasons to Love the Rapax RMS 3+J Upgrade Spring

• No More Twang:
  Eliminate the annoying “twang” sound that often accompanies standard springs. The Rapax RMS 3+J Upgrade Spring helps reduce or eliminate this noise for a stealthier experience in the field. Suggestion: always use grease on a spring guide and on the spring when installing it.
• Beginner-Friendly Installation:
  Thanks to its relatively short design, the Rapax RMS 3+J is easy to install, even for newcomers to airsoft sniper upgrades. This makes it an ideal option for both new and experienced players.
• Designed for Heavy BBs:
  The spring’s performance is optimized for heavy BBs (not 0.2g BBs). Adjust your hop-up for the best flight path before measuring FPS or Joules to ensure your shots are perfectly tuned.

Important Notes:

• If you’re using a Gspec airsoft spring gun (with a shorter 300mm barrel), you may need a stronger spring to achieve the same FPS/Joule output as longer-barreled models.
• Always measure Joules with heavy BBs for accurate results.

Versatile Compatibility

With a 13mm outer diameter, the RMS 3+ spring is compatible with popular airsoft sniper rifles like:

• Silverback SRS
• TAC41
• Novritsch SSG10, SSG24, SSG96
• Modify Scout
• And more!

Why Rapax?

The Rapax RMS 3+J Upgrade Spring is built for airsoft players who want performance, reliability, and durability. Whether you’re upgrading your current sniper rifle or building a new setup, the Rapax RMS 3+J will provide the power you need to up your game.

You can also visit “useful videos” page on this web site to get more knowledge about Rapax springs and other topics. For example, most usefull for many would be the importance to find out how weighted pistons work.

Our similar product from lightpull airsoft spring series https://rapaxsprings.com/product/rapax-3-j-airsoft-sniper-spring/

Rapax Spring Shop

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Homepage.

Looking to upgrade your airsoft sniper rifle? The Rapax RMS 2+J airsoft spring is a great choice for quality, durability, and silence, and it works great with heavy pistons. Designed to be used with Silverback SRS, TAC41, Novritsch SSG 10, 24, 96, and upgraded VSR-10 models with a 9mm spring guide, this APS2 spring delivers outstanding performance.

• You get what you need::
  With this spring you should get 2+ Joules of power or with heavy bb, and most used 420-430mm inner barrels, That´s around 320 FPS with 0,48. Longer barrels will get more Joules and FPS. if you get less than needed, just add spacers (included in a package) on a spring guide.

What is RMS?

RMS stands for Rapax Modular Spring, known for its adaptability and high-quality engineering. Every RMS 2+J airsoft spring includes two plastic spacers (2x4mm) to fine-tune your FPS or Joules, ensuring compliance with field limits.

Key Features of the RMS 2+J Airsoft Spring

• 13mm Outer Diameter: Perfect fit for compatible sniper replicas.
• Durability: Made from high-grade spring wire, tested for over 10,000 shots without losing strength.
• Electrically Coated: Rust-resistant and ensures smoother operation on the spring guide.
• Silent Performance: Minimizes the “twang” sound in airsoft sniper replicas, providing stealthy operation.
• Modular Adjustments: PETG spacers allow you to easily adapt the spring’s power output.

Differences from Light Pull Series

The RMS 2+J airsoft spring is shorter than the light pull series, with a slightly harder pull for enhanced performance with heavy pistons. Its design focuses on providing increased silent shots and easy installation.

Important Notes for Users

• Always measure Joules with heavy BBs (not 0.2g) and adjust your hop-up for optimal flight paths before testing.
• G-Spec sniper replicas (with 300mm barrels) require harder springs to achieve the same FPS/Joules as longer barrels.

Superior Quality You Can Trust

Rapax Modular Springs are handmade in Europe, ensuring:

• Tight Tolerances: Prevent unwanted sound and improve consistency.
• Spring Tempering Process: Guarantees longevity and minimal FPS/Joule loss over time.

Explore More

• Check out our light pull airsoft spring series [here].
• Visit our “Useful Videos” section to learn more about Rapax springs and key topics, including how weighted pistons work.

Upgrade Your Sniper Today with Rapax RMS 2+J Airsoft Spring
Designed for precision and performance, the RMS 2+J airsoft spring is the ultimate choice for serious airsoft players. Silent, durable, and easy to install, it’s the upgrade your rifle deserves.

Join Rapax Facebook Group if you need some advice or change experience.

Order now and experience the Rapax difference!

Are you ready to upgrade your airsoft sniper rifle? Rapax springs are here to help. Regardless if you need SRS Upgrade spring, Tac41 upgrade spring or just want to upgrade SSG10 spring, you are in a right place. These high-quality, durable springs are perfect for boosting performance, ensuring accuracy, and keeping your sniper quiet.

3 Springs of Your Choice

When you order, just leave order note with the spring strengths you want, or email us after purchase. Whether you’re fine-tuning your replica or trying out different setups, this bundle makes it easy and affordable to upgrade your airsoft sniper.

Choose from 8 Spring Options

Pick the exact power level that suits your rifle:

✅ Light Pull 2+
✅ 2.8J
✅ 3+
✅ Hulk
✅ RMS 2+
✅ RMS 3+
✅ RMS 4+
✅ One Joule Spring

Mix and match to customize your airsoft sniper rifle.

Will Rapax Springs Fit Your Sniper Rifle?

Yes! These 13mm OD springs are compatible with many top airsoft sniper rifles, including:
✔ Silverback SRS – The top-rated SRS upgrade spring by players
✔ Silverback Tac41 – The #1 choice for Tac41 upgrade springs
✔ Novritsch SSG10 & SSG24
✔ Modify Scout
✔ And many more!

Need to Adjust Power? No Problem.

If the spring is too strong, simply trim a few coils—without losing durability. (Check out our guide on how to cut a spring here.)

Why Choose Rapax Springs?

✅ Accurate Joule Ratings – Tested with heavy BBs for real-world performance.
✅ Easy Pull, More Power – Less effort to pull the bolt, more Joules downrange.
✅ Optimized for Heavy Pistons – RMS series ensures smooth, efficient operation.
✅ Extreme Durability – Tested for 10,000+ shots with minimal power loss.
✅ Silent Operation – Reduces “twang” for a stealthier shot. (Use lithium or thick grease for ultra-quiet performance.)

Save More with Rapax Bundles

Buying three springs together saves you money and lowers shipping costs—making it the smartest way to upgrade your airsoft sniper rifle.

Handmade Quality, Made in Europe

Rapax sniper springs are made in Europe with highest quality wire, for performance and precision. From reducing noise to enhancing accuracy, these springs deliver results you can rely on if you want to upgrade your airsoft sniper.

Upgrade Your Airsoft Sniper Today

Don’t settle for stock performance. Order now and feel the difference Rapax springs make.

💬 Join the Rapax Community!
Connect with fellow airsoft snipers in our Facebook Group—share tips, get advice, and stay updated on the latest products.

[Shop Rapax Springs Now]