This complete gearbox assembly from JG (Jing Gong) is built specifically for airsoft M4 AEG platforms. It arrives fully assembled, making it a convenient option for those who want an efficient replacement or are looking to upgrade worn internals without complicated installation.
- Compatible with M4 AEG models
- Fully assembled for convenience
- Manufactured by JG (Jing Gong)
Whether you’re restoring reliability to your M4 or preparing a new build, this gearbox offers a practical and dependable solution from a reputable brand.




















