G&g m4 cqb H full metal electric gun (blowback)

new model available with 1joule 8mm gearbox
pneumatic blowback bolt at every shoot (patented)
retrachable stock and 10 inches metal barrel with lr300 hider
full metal body with LMT detachable sight
front handguard for mini/lipo battery (not included)
450rd magazine installed
Weight 2780 g
Length 720/780mm

Technical data:
-8mm gear box with metal bearing
-reinforced piston with steel cylinder
-steel gears and metal spring guide
-hi torque motor with long axle
-229mm inner barrel