SpudFiles

If you're using 0.177" BBs, 1/4" brakeline should have the right inner diameter. Your local model shop should also stock a selection of brass and aluminium tubes in various diameters.

ok cool thanks.

Oh and if i have a 60L sodastream cyclinder what would be a safe air pressure i can put into it with a air compressor?
The bottle says 250bar but i highly doubt ill go that high.

If the bottle says 250 bar then that's your answer that's over 3500 psi, you need a specialised compressor to even approach those pressures.

oh i dont plan on going any where near that much.
i just wasnt sure if it changed when filling with air as opposed to co2.

cross up wrote:i just wasnt sure if it changed when filling with air as opposed to co2.

In this case pressure is pressure regardless whether it's air of CO₂ so no worries.

ok cool thanks for that.
when im finished making it ill put up a pic and see what people think

Hello from Australia

Sorry to bring up an old post, especially as my first post.
But I love your gun design and I joined this site hoping someone can help as I am building my own based on your design.

My main problem is the barrel. How is the barrel attached to the blowgun?

Also, just by looking at it, I have guessed the other items I need. I just need confirmation and info on anything I may have missed or gotten wrong.
I think they are..
sodastream bottle
sodastream co2 adapter??
Regulator (not 100% sure on what one to get)
Air line
Blowgun
Barrel
Scope
Clamps around the barrel and bottle

Any help will be greatly appreciated.

Also, if people have some upgrade ideas, I'd love to hear them.
I will spare no expense on building one of these beauties

hi

mayby this cind coupling
1/4 to blowgun and 8mm OD barrel