G&p 8mm gearbox set for M249/mk46 electric gun (150%)

Hi quality Full set custom internal box available
the best G&P parts and know how is installed into this device!!
suitable for g&p MINIMI type airsoft rifle

internal parts
-trigger
-sp110 steel spring (1.2j)
-8mm steel ball bearing
-steel gear set with delayer
-aluminum CNC cilinder head and seal nozzle
-ventilated piston head and steel piston
-metal spring guide with ball bearing
-switch and wire for rear battery (T comnnector)

to install on hi quality g&p light machine gun and a&k m249 (modify is required)