Guarder Progressive Spring for AEG with a stiffness of SP150 (M150).
Offers performance of 143 - 152 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
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This premium spring by Guarder is designed for electric AEGs and manual SVDs. The spring is made from tempered Si-Cr wire, ensuring its long lifespan and reliability. The progressive (irregular) winding of the spring eases compression in the initial phase, while maintaining sufficient force for optimal weapon performance. Guarder springs are performance consistent even after thousands of shots, and unlike cheap springs, their performance matches their rated stiffness.
Guarder is a renowned Taiwanese brand, known for producing quality parts. Thanks to its focus on precision and quality control, Guarder has earned a solid reputation among airsoft upgrade parts manufacturers.
Guarder springs are available in various stiffness levels from SP85 to SP170, offering different levels of muzzle velocity and desired performance. The resulting muzzle velocity is influenced by many factors, including proper air-seal, nozzle operation, cylinder type, barrel length, and diameter.
| Spring Type | SP85 | SP90 | SP100 | SP110 | SP120 | SP130 | SP140 | SP150 | SP160 | SP170 |
|---|---|---|---|---|---|---|---|---|---|---|
| Muzzle Velocity | 87 - 91 m/s | 91 - 95 m/s | 98 - 104 m/s | 104 - 110 m/s | 113 - 122 m/s | 122 - 131 m/s | 134 - 143 m/s | 143 - 152 m/s | 152 - 161 m/s | 161 - 170 m/s |
When replacing the spring, make sure that the end of the spring with the denser winding is on the spring guide facing outward from the gearbox.
Data sheet
Specific References
AEG Progressive Spring M125 by ASG ULTIMATE with orange marking.
Color-coded stiffness for easy identification.
Ideal for airsoft gun upgrades.
Made from military-grade SiCr spring steel.
Progressive winding for smoother startup and reduced strain on gears and motor.
Guarder Progressive Spring for AEG with a stiffness of SP100 (M100).
Offers performance of 98 - 104 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
AEG Progressive Spring M115 by ASG ULTIMATE with yellow marking.
Color-coded stiffness for easy identification.
Ideal for airsoft gun upgrades.
Made from military-grade SiCr spring steel.
Progressive winding for smoother startup and reduced strain on gears and motor.
Guarder Progressive Spring for AEG with a stiffness of SP140 (M140).
Offers performance of 134 - 143 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
AEG PIANO Spring with Progressive Coil by Action Army – Strength of M120.
Suitable for airsoft gun upgrades.
Made from spring steel Piano Wire.
Progressive winding for gentler startup and reduced stress on gears and motor.
Retro Arms has come out with another piece that helps you build an upgraded beast exactly to your specifications.
A quality spring of standard length with progressive winding for AEG gearboxes, rated at M130.
Progressive (variable) winding makes the spring easier to compress.
Made from valve wire alloyed with silicon and chromium (SiCr).
Guarder Progressive Spring for AEG with a stiffness of SP130 (M130).
Offers performance of 122 - 131 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
AEG Progressive Spring M135 by ASG ULTIMATE with red marking.
Color-coded stiffness for easy identification.
Ideal for airsoft gun upgrades.
Made from military-grade SiCr spring steel.
Progressive winding for smoother startup and reduced strain on gears and motor.
Retro Arms has come out with another piece that helps you build an upgraded beast exactly to your specifications.
A quality spring of standard length with progressive winding for AEG gearboxes, rated at M120.
Progressive (variable) winding makes the spring easier to compress.
Made from valve wire alloyed with silicon and chromium (SiCr).
Guarder Progressive Spring for AEG with a stiffness of SP120 (M120).
Offers performance of 113 - 122 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
Guarder Progressive Spring for AEG with a stiffness of SP110 (M110).
Offers performance of 104 - 110 m/s.
Made from tempered Si-Cr wire.
Progressive (irregular) winding of the spring eases compression in the initial phase.
Performance consistency even after thousands of shots.
Fits standard TM AEG gearboxes and manual SVDs.
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