what about modifying a paintball tank regulator to reduce output pressure? i know some manufacturers make it relatively easy by having removable shims to reduce the spring force that keeps the poppet open. not sure about this one:

http://www.ebay.com.sg/itm/NEW-4500psi-AIR-TANK-REGULATOR-OUTPUT ...

I'm working on a project which will have something like 400psi in the tank regulated down to 250psi chamber/firing pressure (I dont have a compressor).

I'm wondering if this type of regulator is good:

http://www.norgren.com/usa/products/Section.asp?SPID=59

These are more readily available to me ...

haha yeah. i dug around the archives and i saw a post by you with an attached pic of a co2 tank screwed directly into a 1/2" bsp inline ball valve...

but i'd need some way to keep the pin depressed, or maybe remove the pin...is the tank valve easy to disassemble?

Ah, I was hoping to use a paintball tank directly into standard npt or bsp. Is it easier to work with the cga 320 output instead? Like cga to npt adapter...

thanks much.

another question please. what size is the female thread on a paintball tank (pin valve fitting removed)?

im looking to make a 300psi singleshot gun powered manually by shock pump. my aim is higher pressure, since my last project was bicycle pump-powered at 140psi, and i understand im going to have to pay attention to chamber volume this time since shock pumps have tiny stroke volume.

my question is ...