KC Tactical does an unboxing Specna Arms SA-C12 CORE Gate X-ASR MOSFET Unboxing and give their take if it is the best S-AEG (German-spec) for beginners. A compact AEG, it is mainly mde of nylon-fiber reinforced polymer. It features the standard ESA seen in other Specna Arms AEGs and it has a gearbox with 8mm ball bearings, steel gearset and a polycarbonate piston with a full steel rack.