Descrição

The receiver, the stock tube with the enlarged SF type stock housing the battery, as well as the front in the M-LOK standard and the pistol grip are made out of polymer plastic reinforced with nylon fiber. Other components, such as the barrel, flash hider and the enlarged reloading handle are made out of metal (all screws, pins, the case ejector flap and dummy bolt are made out of steel). There are markings and a serial number on the receiver.
Features:

Front in the M-LOK standard
Flip-up sights.
The barrel of the replica has a 14mm CCW thread
The replica has been fully adapted to work with LiPo and LiFe batteries. 

Inside the replica you will find:

ESA(TM) quick spring change system. This allows for quick and efficient adjustment of the replicas muzzle velocity
8mm plain bearings
Steel gears
Polycarbonate plastic piston with a full steel jaw
Rotary hop up chamber
6,03mm Precision Barrell

The set does not include a battery or a charger.
The set includes:

replica
magazine
additional M90 main spring
User’s manual
QC certificate