I was thinking about building a rifle that could reach 60-100 meters with power but considering something like this could blow in my hands built with PVC i'd like some words from experient users first.

So from my understanding there's a barrel, valves, the air tank, a second air tank with lower PSI for shooting and the optional lead, pellets reservoir. I think what im looking for is something that shoots 800 PSI? Should i look for a tube that can hold 800 PSI or 900-1000 PSI? the barrel needs the same PSI resistance?