Thanks, this helped me. I'm just wondering about how i could cover the "Air chamber-pipe". I mean one side will be connected to the ballvalve but the other side has to be covered. can i use just the cover made aot of plastic and drill a wohle in it for the Schrader-valve or will the air flow out then?

Hello guys, i'm new to the forum, so hello everbody! I'm currently building my own airgun. Therefore i'm using a ballvalve,a copper barrel. At first i wanted to use a normal waterbottle, but since it does not fit well into the valve and tape doesn't help either, i decided to buy a copper steal barre...