Mach Sakai tries what he says is a super lightweight M4 AEG. The  X-Bone Airsoft Custom G&G FireHawk  AEG weighs just 1kg and it is compact. It comes equipped with a suppressor, Tokyo Marui Pro-Sight, fiberglass handguard, and fiberglass stock. There is no mention if there are internal upgrades done. Watch him go over the feature and the usual quick steel challenge test.