Lavrikov Airsoft has a quick demonstration of the SRC MP5A5 AEG that has been converted to be HPA-powered. This is also rebranded Umarex Sportline MP5A5 AEG, an affordable AEG for airsoft beginners. As for the HPA engine, it uses VVD System “Valkyrie" HPA engine which features a low level noise, available for different types of AEGs.