SpudFiles

Ok, so this isn't on fitting an air gun like we use for modding sprinkler valves but for having a .40 caliber blow gun fit in a 3/4" pipe. This WILL not be technical just something I did just a few minutes ago with awesome results.
Take the blow gun and remove all accessories, the quivers, mouthpiece, and grip, now cut the mouthpiece in half and put one part in the valve end of the barrel.
Slide the blow gun in and once its all the way to where it needs to be which should be to where it will almost rest on the valve so that the darts do not fall out and get caught and slide the other half of the grip so that it plugs the muzzel end of the 3/4" pipe, this does not serve as a plug but to steady the blow gun inside the barrel.
Enjoy.
Now don't complain about no pics or anything because if this un-understandable you are a retard. I did this to have a way to shoot the darts and then realized that the much less harmful and safe disposable earplugs are a nice fit in there. I was able to shoot a stun dart through a chunck of syrofoam 2" thick at only 15psi.

maybe some pictures?

You're kidding right, I actually can't post a pic prolly until tomorow being that my card reader broke so I gotta borrow moms.

i didn't mean how to make it, i meant result

Ohh. Well heres one.

Research has told me that the most effective lenght for a hunting purpose blowgun is about 5', with the ammount of force compared to just blowing I can produce with this one will be phenominal with such a barrel.

Those look cool! someone should sell them.

I could sell wooden fittings to support the blowgun in the rear, I made one after using the foam although it works just as good its easier to remove the blowgun to use just a 1/2" barrel. Want one, If you have paypal I'll make it and ship it. I could buy a blowgun and send it complete for a few more bucks or you could buy one. PM if your'e interested.