AEG AP120 spring

AirsoftParts AP120 AEG Spring
AirsoftParts AEG spring is made from high-quality valve spring wire manufactured in Germany. The spring undergoes heat treatment and uses variable coil spacing, giving it progressive characteristics for easier spring compression during the initial phase, thereby reducing strain on the motor and battery and potentially increasing RoF. AirsoftParts springs are designed with an emphasis on maintaining stable force during long-term use and limiting performance changes caused by gradual spring fatigue. For easier identification of individual variants, the end of the spring is color-coded. The spring is compatible with standard V2, V3, V6 and V7 gearboxes, but is not designed for special extended configurations such as V4 (PSG-1), V2.5 (SR-25) or L85. When replacing the spring, we recommend considering the entire gun configuration, as the resulting muzzle velocity depends not only on the spring rating but also on the air seal, barrel length and diameter, cylinder used and other components in the setup.
Estimated Performance of AirsoftParts Springs

ModelSpring RatingEstimated Muzzle VelocityEstimated Muzzle EnergyColor Code

AP100
M100
98–110 m/s
0.95–1.20 J
Gray

AP110
M110
107–122 m/s
1.14–1.49 J
Green

AP120
M120
119–131 m/s
1.41–1.72 J
Red

AP130
M130
125–143 m/s
1.56–2.05 J
Yellow

AP140
M140
137–149 m/s
1.88–2.23 J
Blue

AP150
M150
149–177 m/s
2.23–3.13 J
White

AP160
M160
171–186 m/s
2.91–3.46 J
Orange

– The stated values are approximate manufacturer figures when using AirsoftParts internal components. Muzzle velocity and energy are approximate calculations for 0.20g BBs. Actual performance may vary depending on the specific gun setup, air seal, barrel length and diameter, hop-up system and other components used.
Key Features

High-Quality Valve Spring Wire
The spring is made from valve spring wire manufactured in Germany specifically for this application and designed for long-term cyclic loading.

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