Custom KWA Full Metal KM4 RIS LiPo Ready AEG

Kwa km4 RIS airsoft AEG with 2gx gearbox. it has been a great gun and I have upgraded it in a few areas, it has a stainless steel tight bore inner barrel 410 mm in length, mosfet is a IRL 3034 based mosfet and rewired to 16 gauge low resistance wiring wit