Valken Battle Machine Main Spring

This Airsoft AEG Upgrade Spring is an internal gearbox spare part.

**The FPS estimate is based on the average power output, and exact FPS result may vary based on alignment, installation, inner barrel, cylinder, and other factors.**

M80: approx. 260-280 FPS This AEG spring reduces a decent amount of stress, wear and tear for your gearbox

M90: approx. 280-295 FPS This AEG spring reduces stress, wear and tear for your gearbox

M100: approx. 295-330 FPS This AEG spring is a CQB field style spring

M105: approx. 310-345 FPS This AEG spring is useful for fine tuning CQB style airsoft guns