Dexter Airsoft takes a look at the first HPA engine/gearbox from Ares Airsoft. The ARES HEB-001 Airsoft Complete V2 HPA System Gearbox Set, a high-tech masterpiece designed for the Tokyo Marui and ARES M4 AEG Series, offers increased efficiency and compatibility with gas, CO2, and compressed air. Featuring a single-sided selector and electronic circuits, this set allows you to enhance your airsoft performance with 4 BAR or higher air pressure and a powerful 11.1v battery equipped with a TX30 connector.