G&g m4 gr16 carbine electric gun (blowback)

new semi/full automatic model available
8mm gearbox with 1j spring installed
steel gears with reinforced piston and hi torque motor
pneumatic blowback bolt at every shoot
retractable stock and 14.5 inches metal barrel
reinforced nylon fiber body with battery handguard
detachable carrying handle with rail for dot or scope
fits mini/lipo or separate custom battery (not included)
450rd magazine and 1000bbs free
Weight 2490 g
Length 780/970mm

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
-407mm inner barrel
the model is sold with both red and black plastic hiders