At NAPA Auto parts, it's about 2.50-3.00$ for a 20" piece. As for connecting them, the brakeline comes with a male compression fitting. Just find a female compression fitting of the same size. After you do that, just adapt the female compression fitting to a 1/8" NPT thread. This will just screw in the outlet port of the blow gun. If you want to take the easy but crappy way out, just JB Weld the barrel to the blowgun.
I made something very similar except I used a real airsoft barrel. What I did was wrap about a cm of Teflon tape around the barrel. Then I just threaded the wraped part into the smaller threaded part of the blowgun.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You can download files in this forum