LCT 6mm complete gearbox for m4 electric gun (rear wiring)

Hi quality full set custom complete gear box available
the best LCT parts and know how is installed into this device!!

external parts included:
-selector plate
-trigger and stock wiring

internal parts
-sp120 steel spring
-6mm steel bearing
-steel gear set with delayer
-aluminum CNC cilinder head and acetal seal nozzle
-ventilated piston head and steel/polyacetal piston
-switch and wire for rear battery with stock extension (tamya small comnnector)

to install on hi quality m4 rifle such Marui,Lct,g&g,g&p,king arms etc.....