G&g m4 cqb ras combat machine electric gun (tan)

Combat Machine model with semi/full auto selective fire
8mm metal gearbox with 1j spring
short version with 10.5 inches metal barrel
reinforced nylon fiber body,and multi rail handguard
crane type retractable stock for separate betteries (not included)
metal stock plate with ring for single point sling
450rd metal magazine and 1000bbs included
Weight: 2320 g 
Length: 670/750mm

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
-nylon hop chamber with 230mm inner barrel
the model is sold with both red and black plastic hiders