Retro Arms CNC VFC QSC 8mm V2 GearboxThis particular version is made for VFC receivers. Note that the picture is for reference ONLY and the colour of the gearbox may vary batch to batch. CNC gearbox V2 designed for airsoft replicas AR15 (M4), M16 and other ones with V2 gearbox. This gearbox is manufactured from one solid block of aircraft aluminum (Dural) EN AW 7075 T651, which has higher strength (590MPa), than common construction steel (390MPa). Because of used material, our gearboxes