How does this work without having a pressure guage??

Man thats awesome! I would like to make a slingshot but dont really know which design to pick.

Sorry for possible double post. The part I added is a brass cap that has a big hole drilled through it so that you can strike the bolt yet it stops it from being blown out by the pressure. By tightening or loosening the cap you can adjust the striking force that is needed.

Well im pretty sure he can make a perfect fit since he has a lathe ( im asuming he does otherwise idk how he made that bolt) but the stopper could easily be something like a + welded right on top of the bolt. If you guys want another diagram I can draw one up really quick.

I was wondering if this design would solve the issues of your sealing rubber getting ripped off. Instead of the bolt sealing against that piece of rubber glued to the T would it be better to have an O ring on the bolt and have the bolt sink inside the brass T up until the black stoppers. This valve ...

Those were most def not .22

Mark whats that in your sig?

My biggest qeustion is how did he get the hammer to go back to its original position??

Slish Solar tak ti chuvak Russkiy?

Sooo What? Does this make higher psi by using lower psi? o.O translation?

Nice man!! Didn't think potato would seal that good! Make it into a single shot sniper rifle! How much psi were the shots at??

No this guy was saying he melted soda can with a hair dryer...

Where did you get your hair dryer at? Iraq?!

Take a coaxial cable as an example. Its a wire inside of a mesh wire.

2 mono blocks cost more and you I dont no money but like 70 dollars

Edit: wow I cant talk right now its too late so I am goin to beddddd

Yea yea thats what I am shooting for man!!!