A High Pressure Air (HPA) system is a popular choice for airsoft guns. This is because it allows the user to customize their gun's performance using air tanks and regulators. The air tanks provide the necessary air pressure to propel the ammunition, while the regulators allow the user to adjust the pressure to adjust the velocity of the ammunition. This makes HPA systems perfect for players who want to fine-tune their weapons for better accuracy and range. With an HPA system, you can make quick adjustments on the fly, allowing you to get the most out of your weapon in any situation. Furthermore, HPA systems are more reliable and efficient than other types of air systems, allowing you to shoot more rounds with less air. As a result, HPA systems are highly recommended for those looking for an upgrade to their airsoft gun.