Golden Eagle JG Airsoft M4 Polymer Lower Receiver Complete with Gearbox and Motor
Polymer lower receiver is compatible with Golden Eagle JG brand of polymer upper receivers.
Upgrade-able version 2 metal gearbox and steel gears.
Motor and motor grip included.
Internal M120 spring capable of providing up to 420 FPS (actual FPS will depend upon hop up unit, bucking, and inner barrel used).
Wired to the rear.