It's extremely tight. As I said I had to sand the ends down slightly and use a hammer to get them to slip on.

Just converted this gun to a hybrid, but havent tested it yet...I dont have a pump but I cant wait.. I'll post new info and pics in a couple days. The idea hit me all of a sudden and the conversion only took 5 minutes!!

Pretty sure I got the PEX from Home Depot. It's 3/4 inch but you have to sand it down a bit so it fits, then use a rubber mallet to push it all the way in.

Im pretty good at making these coke bottle cannons and I love them. Theyre cheap and can be pretty impressive for their size. My first combustion was a coke bottle so perhaps this is why im so attatched to them.

Nice wooden handle.

I love these kinds of projects, you dont have anything to work with but you wanna put something together. Some of my beter ideas come from these kinds of projects because it really challenges your creativity and gets you thinking outside the box.

Nice work , have you tested it out yet or do you still not have an ignigtion source.

Very nice i have a similar idea i hope to put together soon.

First post but far from my first cannon. Hope you like it. PEX tubing chamber with coke bottlecaps closing each end of the tube (the mouth of the bottle was cut off and fits around the PEX, both caps screw on and off) one for the vent one for barrels. Piezo ignition, and bic pen barrel. Very sturdy ...

my first pneumatic was a metal mini, it s chamber was only 1/2"x 10".

You really went to town with that cannon didnt you? too bad you dont have an old tv laying around..

a triggering system that you could use could be heavy gage wire possibly a coat hanger (depending on how heavy the load the bow produces) in the shape of an "s" where the "s" is tilted to the left to lay on its side and bottom part of the s extends straight out for the trigger and the top part of th...

definatly keep the fish food container i think it gives your gun character..

I like what you did with it in the final design by incorporating it with the paintball gun, it really takes the practicality up a notch. nice work

I made a gun in a shampoo bottle once, with disposable camera ignition, and a golf club divider tube, total cost $5 including the full shampoo bottle. Gotta love being able to whip something up together with next to nothing. It really makes me proud.