I know the pros of HPA. What I'm asking are how do aluminum(steelie) HPA tanks compare in weight to CO2. I already know carbon fibers are very light Kind of what I mean about not getting a straight answer, haha. I ask a simple question, "How does the weight of an aluminum HPA compare to a 20z CO2?" And everyone goes off about how great HPA is and how much CO2 sucks... but I already know about all that lol.