G&g ak47 black type full metal electric gun (blowback)

new model with 8mm gearbox with 1 j spring
semi-full auto selective fire
full metal body and barrel with abs handguard and stock (take large battery)
patented penumatic blawback bolt at every shot
side svd type rail for mount base installation
600rd metal magazine and 1000bbs are included
length: 890mm
weight: 2700g

Technical data
-reinforced 8mm gear box with ball bearing
-1 joule power tempered spring with seal nozzle
-steel gears with integrated delayer cam
-reinforced piston with polyamide piston head
-hi torque motor short axle
-455mm precision inner barrel