With the Begadi having their HW47 now in HPA, BB2K Airsoft got one unit and here is Bruce's comprehensive overview... "HPA is more up-to-date than ever, because HPA is weather-independent and there is no power fluctuations in heat or cold like gas. In this preview I would like to introduce you the brand new BEGADI HW47. A Lonex AK47 upgraded to the POLARSTAR V3 Engine. Begadi already offers you a small range of HPA systems that are continuously expanded."