OK, I like that, The peice of delrin would have to be larger, I tore apart a spider paint ball marker, and was looking at it, even though it has the two slides, one above the other, it still looks simpler than a tippmann gun. choices, choices, choices, MMMMMM?
Chuck

Well That is still cool Pryrogeek, if all of our inventions failed we would give up, but works like crap, means still kinda worked! RIGHT!!, I have to get the delrin still. Just a note, tomorrow I am getting 2 pieces of bronze to turn for a pair of cannons. I love building cannons, 75 calibur baby! ...

Ok I looked at the semi auto, and I will go over the plans again, I am going to make a semi auto if it kills me, either litterally, or I go broke! LOL I plam on using a 2in barrel, I am kinda hooked on this 200 caliber beast, and the final version will be CO2 fed. Well I guess is is back to the draw...

Ok here is my idea for a simple delrin bolt for a semi auto *****(you fill in the blank) cannon. I was looking at all these paintball bolts that are made out of delrin, so I looked it up on ebay, and some commercail sites, for availibility, and tooling. It is easy to turn on a lathe, and yet very st...

today I took a small waterballoon, slid it into an old toilet paper tube, duct taped the back end, and I used a piece of foam rubber(pipe insulation) for a "wad" the waterballoon was protruding from the tube, and I gassed up to around 100psi, (2in air cannon, with a 36in barrel, and a 36in chamber),...

Ok, I see this stuff has been here a while, but, I turner down a coupler before, and it worked pretty good, I had thought about how to make a piston, and this had never evenoccured to me, I will give her a GO, and let you know my results with the couler piston.
Chuck

The pic of the text is not clear, what preasure are they rated for?
Chuck

Ok here is a little sketch I did, I think that putting the lock behing the chamber will work just fine, with rigid aluminum pipe that is. Tapering a fit between the barrel and the bolt should help get a nice seal, and I figure to cut out a groove with the lathe for a couple orings as well. As for th...

Thank you, I have gotten as far as putting some of it to paper, I am trying to get together the materials now, I work on alot of construction site, so I like to use "srap" when I can find it, scrap for the trades is anything left over that is under 5ft long, so it may take a couple of weeks to get a...

This looks like a great option for a bolt action gun/cannon. With an oring at the front of the bolt I think you would cut out any leaks, or at least most of them. I think I might give this a try in a 2in rigid aluminum pipe. Machine out 1/2 a coupler, then thead the barrel on one end without removin...