AA PIANO Wire Steel Spring for AEG – M130

AEG PIANO Spring with Progressive Coil by Action Army
The spring is a key component of the gearbox because its strength, together with air seal quality, directly affects the overall performance of the gun. Low-quality springs may initially offer higher-than-rated performance but tend to lose tension quickly, shorten, or even break—especially if stored compressed or left in pre-cocked mode.The PIANO upgrade spring from Action Army is engineered for maximum performance consistency and long service life. Crafted from high-grade spring steel, it resists wear even during high-rate-of-fire scenarios.Its progressive coil starts off soft and becomes stiffer, easing the load on the gear mechanism and motor. Each spring is pre-tensioned at the factory, ensuring stable performance from the first cycles—unlike cheaper alternatives.

Installation
When installing a spring with progressive winding, the compressed end (the section with tighter coils) goes onto the spring guide.

Available Action Army AEG Spring Strengths

M95 (1 Joule)
M100
M120
M130
M140
M150

Technical Specifications

Stiffness: M130
Output after installation: Approx. 130 m/s
Material: Spring steel
Winding: Progressive
Compatibility: Most AEG gearboxes (excluding V2.5, L85, PSG-1, and other atypical versions)

Package Contents

AEG PIANO Spring