Ok so here is the cylinder I have got. Its rated to 30 bar, or at least it says 30 bar on the side. How to I convert this to use as an air tank? I would like to keep the threads on the top as they fit my gun I am making. http://i1238.photobucket.com/albums/ff481/nathanhd123/5557f305.jpg http://i1238...

Is that the brushed aluminium ones or the plastic?

It would be attached to a 3/4" female tee. What kind of pressure can the soda stream bottles hold?

About 200 psi or so

Is a fire extinguisher the best option for an air tank on the gun or is there another cheap option that can take a decent pressure?

With this setup what fitting would you use to attach the barrel to the rest of the gun. Also with the fire extinguisher do they just screw straight on if you remove the normal valve and use a connector?

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Definitaly having it air tight helps. However I dont think ist the end of the worl if it leaks a bit.

Mini nerf rockets.
http://www.amazon.co.uk/Nerf-810002-Poc ... 426&sr=8-1

Thanks, I did try google but after researching I didn't realise it was a straight conversion like that.

What is the material to make a 3/4" piston out off?

Haven't tried it yet but lots of stainless steel pipe and fittings.http://www.nero.co.uk/

Here is a video I have found today whilst doing research for my next gun. Have a look.

http://www.youtube.com/watch?v=apSA_ny8 ... c6122zopEw

Does anyone know what diameter barrel you need to fire air rifle pellets? (whats .22 in mm?)

If copper pipes fail do they shatter, crack, split or what?

Is copper pipe pressure rayed. If so does it leak Through the solder?

I want to make a copper pneumatic sniper. Do you have to weld the pipe together or is ther other ways oof connecting parts?