Oh ok, so would threading the hole and putting a piece of pipe through it and the barrel attaching to it work? And can the pipe be sticking inside the vortex?

Oh ok, well ive done custom work on both of my airsoft guns and the hopup spacer is loacted at the bottom of the barrel. Thats why i am a little confused

yeah, i figured a nice pipe would work just as well as a block, and im just having trouble with the hopup because i was thinking it might be to close to the pipe to get a screw in there. And from what ive read, the brake pipe has to much blowby so i wouldnt really need to drill a hole unless im wron...

I plan on making an inline vortex gun soon and have some airsoft barrels laying around and was wondering if anyone had a setup where you could use the hopup. I am probably going to try to make the vortex out of steel tubing so if you have any suggestions on making that work please feel free to comme...