SpudFiles

im looking for a particular blow gun , any that can hold 300 - 400 psi through the top and has a 1/4 npt thread top aswell

i currently have something like this http://cgi.ebay.co.uk/Bodyshop-Workshop ... 535wt_1110

but doest hold past 80 psi through the top

you can probably use it the other way since the valve is probably not meant to support that much pressure at that end but you can use these

http://cgi.ebay.co.uk/6-PIECE-AIR-BLOW- ... 3a67048458

they work for high pressures i assume, just dont use it to pilot anything big

yeah i know they do well , i have 2 or 3 lying around but i cant use them for what im making

Are you trying to use the pistol type? The only high pressure ones I know of are pressure washer handles, but if you don't need the pistol type you can use the compressor type, just make sure it's a quality one, jsr uses them to 500 psi I believe.