13mm APS spring for SRS Pull version - 300FPS, 40N (M90)
APS 13 mm large type spring for SRS pull bolt version. Can be use in APS-2, APS-T96, APS-SR2, M24.
Silverback springs are named by the force (in Newton) needed to compress it to their “shooting stage”.
Dimensions: 13 mm outside, 11 mm inside diameter
Data in spring charts are average, there might be variation due to multiple factors.
- 40 Newton : M90, 300 FPS
- 60 Newton : M120, 400 FPS
- 75 Newton : M130, 430 FPS
- 90 Newton : M140, 460 FPS
- 95 Newton : M150, 500 FPS
- 110 Newton : M160, 525 FPS
- 145 Newton : M170, 560 FPS
Established in 2008 by airsoft addicts and serious wargamers in Hong Kong, their goal is to better serve fellow mates in this unique sport with the most innovative and high quality products that one will require in any airsoft fields situation. Silverback became famous with its unique SRS sniper rifle licensed by Desert Tech.