High Power Airsoft Spring – Rapax HULK-4+J

Rapax HULK High Power Airsoft Spring (4+J)

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.