Dboys m4 sd ras full metal electric rifle

electric model with cqb battery and charger
USMC metal body with battery slide stock
detachable rear sight,rail handguard,vertical grip and barrel extention
300rd metal magazine included
length: 700/780mm
weight: 3400g

Technical data
-7mm gear box with metal bearing
-reinforced piston with 1 joule spring
-steel gears with delayer cam
-hi torque motor long axle
-hop chamber with 247mm inner barrel