ZCI M100 Tune-Up Spring

Looking to adjust the velocity of your AEG? Need to meet a certain limit for your local range? Check out the ZCI M100 Tune-Up Spring. This spring is great for those looking to have the velocity rating of your AEG to hit around 350 FPS in standard 14" barrel systems, but be aware that other factors will likely affect this approximation. This spring is designed to fit most Marui Spec AEG gearboxes.

Features:

• M100 spring strength
• Compatible with most Marui Spec AEG gearboxes

Specifications:

Spring Rating: M100
Compatibility: Most Marui Spec AEG gearboxes