If the debate on HPA Airsoft has not been settled yet, feel free to discuss with Defrowe Airsoft... "Have you ever wondered what the debate is over the use of HPA (High Pressure Air) systems in airsoft? In this video, I discuss the controversy surrounding HPA systems and why I personally don't use them. I explain the potential for abuse of power, the physics phenomena of joule creep, and the discomfort of having to run around with a big line and a heavy tank. I also discuss the evolution of technology in airsoft and how it has allowed for HPA performance without the line. Finally, I talk about the sound of a properly built gearbox and why I prefer it to the sound of a HPA system."