SHS Gearbox Upgrade Springs are affordable variable pitch springs for AEG mechboxes. The M120 Power Up Spring delivers 380-410 FPS in AEG gearboxes.
SHS Power Up Springs Feature:
-Variable Pitch Construction
-Durable Chrome Finish
SHS Parts are affordable, quality airsoft repair and upgrade parts. These universal upgrade parts fit most airsoft guns and are ideal for use in repairing any brand AEG or for upgrading entry-level replicas. All SHS Airsoft Parts are made in Hong Kong.