Outer Barrels
Suppressors
Magazines
Inner Barrels
Hop Up Chambers
Buckings
Gearbox Shells
Drop-In Gearboxes
Mosfets
TRIGGERS
AEG Internals
HPA Parts
SP85-SP170 AEG Tune Up Spring
SP85-SP170 AEG Tune Up Spring
This Guarder AEG Tune Up Spring is amongst the best and most consistent upgrade springs for your AEG electric gun. It is made of high-quality steel which guaranteed to optimize your rifles performance by maintaining a constant spring force throughout its life time. It offers different velocity options depending on the spring force. This spring will help you get the most out of your airsoft gun.
Spring Force
Note that your rifle's power also depends on other factors such as your barrel length and cylinder volume.
| Option | Spring Force |
| SP85 | 4.37 kg |
| SP90 | 5.77 kg |
| SP100 | 7.60 kg |
| SP110 | 8.63 kg |
| SP120 | 9.70 kg |
| SP130 | 11.97 kg |
| SP140 | 14.17 kg |
| SP150 | 16.33 kg |
| SP160 | 18.10 kg |
| SP170 | 22.00 kg |
About Umbrella Armory
Umbrella Armory is a performance engineering workshop specializing in precision-tuned airsoft rifles and HPA systems. Founded in California and now operating in Austria, Umbrella Armory builds fully optimized replicas for competitive players who demand real ballistic consistency and reliability.
Every rifle is individually assembled, calibrated, and verified under live conditions to deliver perfect shot-to-shot accuracy and efficiency.
Umbrella Armory’s mission is to bring professional-grade performance to serious players worldwide — combining craftsmanship, testing, and innovation for the most consistent airsoft systems in the field.