The Rapax One Joule airsoft spring is crafted for precision and durability, making it the ideal choice for airsoft sniper rifles like the Silverback SRS, TAC41, Novritsch SSG10, SSG24, SSG96, Modify, and upgraded VSR10 models. Its 13mm outer diameter ensures compatibility with these platforms, offering a seamless fit and consistent results.

Features and Benefits

• Regulation Compliant: Designed to meet the 1 Joule sniper limit required in Ireland, Italy, and other countries.
• Durable Design: Electroplated to prevent rust and reduce friction, ensuring smooth operation and long-lasting performance.
• Easy to Use: A lighter pull compared to standard springs means less effort while maintaining optimal power output.

Performance Adjustments

The Rapax One Joule airsoft spring reliably reaches 1 Joule on setups like the SRS 16-inch barrel or SSG10 (430mm barrel). Performance may vary depending on barrel length or piston configuration.

If the spring delivers more than 1 Joule (e.g., 1.2J):

• Leave it compressed for 24 hours by pulling the bolt.
• Trim up to two coils if needed (instructions available on the Rapax website).

For less than 1 Joule, simply add a spacer to the spring guide.

Note: Always measure using heavy BBs, not 0.2g BBs. Adjust the hop-up for a straight flight path before testing.

Why Choose Rapax?

With its special tempered process and tight manufacturing tolerances, the Rapax One Joule airsoft spring reduces noise (“twang”) and maintains stable FPS over time. Proper lubrication during installation further enhances performance and durability.

Whether you’re upgrading a Silverback SRS, TAC41, or SSG10, the Rapax spring ensures top-tier results for airsoft enthusiasts. For more powerful setups, check out the 2+ Joule springs also available from Rapax.

Facebook group