The hose is connected by NTP fittings if i remember correctly.
Just making sure.

Using SCH 80 piping I estimate it will cost around $150 ( SCH 3" and 2" fittings are $$$$. Currently the only thing i am having trouble finding it 1/4 in tubing ( located on the bottom of picture).

The other question i have is what fitting to use to connect the tube to the primary chamber.

It is not a cannon on this site. It is from a site that sells spud guns.

Yes, the reply was something along the lines of "buy one and find out", but i think i can build one for much less than $400.

Any ideas about what the tubing is? and it is attached to the primary chamber by a nipple fitting, right?

Thanks, any other suggestions in the building of this gun?

Do you think that the pipe is cut or these are slid over it? Could they be to direct the air flow?

I was curious about the raised parts on the 3 in pipe and also in the middle of the 2.5 in. I thought these might be to reinforce it.

Hey. This is my first post on this site. I have made a combustion and a ball valve pneumatic gun, but I am wanting to make this gun that i saw and was wondering if i could get some help identify some parts of it. I filled in some that i think i know and circled fittings that i am not sure of. If any...