This thread is under construction. Probably worth reading, but it's not comprehensive. Welcome to the High Pressure Air (HPA) FAQ. Here we'll be covering the basics of what HPA is, what it's advantages are, how to find out if HPA is for you and how to shop for HPA products. If you're wondering about getting into HPA for airsoft then please read the entire FAQ before asking questions - this will save yourself and other forum members a lot of time and effort. At the bottom of this post you will