Aim m4 a1 usmc full metal electric gun

new full metal model available
semi/full auto selective fire model
USMC aluminum metal body and outer barrel
slide stock nylon hand guard with battery housing (not included)
detachable carrying handle with 300rd magazine
length: 780/890mm
weight: 3300g

technical data
-8mm gear ox with ball bearing
-hi speed piston with steel teeth and ventilated head
-steel gears with self allign shims
-hi speed and torque motor installed
-hop chamber with 363mm inner barrel