This is a demonstration of the Airsoftjunkiez Custom EF MG4 HPA Light Machine Gun. The build incorporates a Polarstar F2 LMG HPA Engine for air operation. For ammunition feeding, it features Custom TCU Box Mag Electronics equipped with dual battery ports. Precision is enhanced by a Prometheus 6.03 509mm Tightbore Inner Barrel along with a Custom Flat nub & Bucking system.