Echo 1 Replacement M4 / M16 Airsoft Gun Ported Non-Bore Up Cylinder
The Echo 1 M4 / M16 Ported Cylinder is compatible with any full metal, version 2 gearbox. This cylinder is perfect for providing excellent compression and boosting FPS and range.
- Provides excellent compression
- Rated for 360mm - 400mm barrels
- Increases FPS