hi iam making a riffle i live in australia and couldnt find the exact pipes as you mentioned but i got HR PVCU from a plumber suppliers shop i recently found near my place i was wondering if you have heard of those and if they will do i made the bottom barrel for air pressure 2" and 15" long and the shooting barrel is 3/4" and just bit over 2 foot long i was wondering on your opinions of this any info would be greatly apreciated thanks a million
i will post pics soon