This is the D-boy high preformance M4 BY036. (BI-3681M)
The BY036 has a full metal body with only the stock and foregrips being made of plastic.
1/1 Scale High Performance Assembled Electric Powered Airsoft AEG and comes with a P-mag style magazine that can accommodate 300 Rounds.
it also has a 4-Position Retractable Rear Stock to offer versatility on various combat situation.
Charging handle allows opening of the bolt cover to adjust HOP UP.
Constructed of Version 2 Metal Gearbox with same mechanism as of Tokyo Marui's .
**Comes with battery and charger**
Length :790mm / 870mm (Extended)
Shooting Mode :Semi/Fully Automatic
Power Source :7.4v (Mini Type)(Mini Plug)(Hand Guard)(Included)
Weight (Gram):3515(With Box)
Color : Black
Magazine Capacity :300 Rds
Barrel Thread Type : 14mm CCW
Bullet Type : 6mm BB
Power (Muzzle Velocity) : 400 fps(0.2 Gram BB)