E&C GearBox Shell for M4 Series (8mm, Quick Spring Change)[ECMP47]
- E&C QD Transform 8mm bearing GearBox Shell Ver.2 for M4 Series.
- Essential part for upgrading your Airsoft Electric Gun AEG.
- Easy power upgrade system.
- Quick release spring and steel spring guide for easy power adjustment / spring replacement.
- Include 6pcs ball bearing and spring guide.
