HPA, also known as High-Pressure Airsoft, is a range of Airsoft Guns and related items designed specifically to facilitate high-power, high-end Airsoft shooting. These replicas are powered by highly pressurized air that is held in an external canister for feeding into the weapon via a regulator and line. Don’t worry — as long as you do the research, it has been shown many times that HPA Tanks are a safe and effective source of power with a few precautions in place. At Just Airsoft Guns, we stock a huge range of excellent HPA-related products designed specifically to optimize the quality of your sharpshooting experience. We stock a great range of brands like Air Venturi and PolarStar.