Rapax One is 1J spring- made for – SRS/TAC41/SSG/VSR.
Can be used in Silverback SRS/TAC41, Novritsch SSG10, SSG24, SSG96, upgraded VSR10.
Made to comply with Ireland, Italy and all other countries regulated with 1J sniper limit.
Springs are 13mm outer diameter, so they fit all above mentioned sniper replicas.
Springs are made in Europe and Electroplated to prevent rust, reduce friction and give you prolonged period of usage compared to other springs.
Confirmed results of reaching 1 Joule with a standard SRS 16″ and SSG10 (430mm barrel).
Joules may vary depending on the barrel length and piston used.
Depending on setup effectiveness, spring can give more then 1J (1,2 for example). In that case, just cock the bolt and leave spring for 1 day, after that, try again and if needed just cut 2 coils.
Instructions how to cut the spring here: https://rapaxsprings.com/how-to-cut-airsoft-spring/
If you have less power then you should add a spacer on a spring guide and you are good to go.
All springs are the same length, use the same material, have the same number of coils, etc.
Tempering of these springs is made in a way to guarantee a long lifetime and very small FPS/Joule loss over time.
These springs are made in tight tolerances regarding diameter, they prevent the “twang” sound in airsoft sniper replicas.
Before you install, put a suitable amount of grease on the spring & spring guide.

January 2026

Rapax One 1 Joule Spring - SSG-10/24