G&g complete gearbox for m14

Deluxe model with 8mm ball bearing and ultra custom internal parts
fully assembled with wire set and fuse box
ideal to upgrade and improve the internal gun quality
for g&g m14 models only

INTERNAL PARTS INSTALLED
-8mm steel ball bearing
-hi protection and resistance steel gear set
-reinforced piston with ventilated piston head
-power spring made of steel
-ball bearing spring guide
-metal cylinder and cylinder head