LCT PK-371 Ver.3 Quick Spring Change Gearbox Shell for AEG (With 6pcs of 9mm Bearing)

For LCT AEG.

Ver. 3 (V3) Quick Spring Change gearbox with 9mm bearings.

If you are running an older non-QSC LCT gearbox, these are a good upgrade for both convenience and durability, as 9mm bearings are sturdier than those in the older gearboxes.