Madbull M120 Upgrade Spring for AEG Airsoft Guns
The Mabull M120 AEG Spring is designed to be used in almost any full metal airsoft AEG gearbox. The spring is built with high quality steel for maximum durability and reliability. Upgrade your airsoft gun's velocity to a 390-400 FPS.
- High quality steel construction
- 390-400 FPS with .20g BBs
- Compatible with all Airsoft AEG gearboxes