Makhobby discusses the advantages and disadvantages of using CO2 and HPA for airsoft, airguns, and whatever gun that uses such power sources... "Comparison between Co2 vs HPA airguns, or airsoft guns or whatever guns that uses these things. There isn't really a definite answer to which is better because they are both very good for different purposes, but here we will lay out the facts! I personally do love HPA but I still love Co2 today, why? Watch!"