Air nossel question

[tony2405]

I am building a spud gun that uses the sprinkler valve witha blow gun. It has an air pressure gauge on the chamber but i cant seem to find a air nossel to put on my chamber so i can put pressurized air into it. Can anyone steer me in the right direction of where i can find what i need.

[spudshot]

a schrader valve is what you want