My first Sumatra

http://www.pyramydair.com/s/a/Quick_Disconnect_Male_Fitting_O_Ring/2841

It's a foster threaded for Korean guns. No need to degas there is a check valve, 
  • Installation instructions: To start the old fill port turning, insert the round shaft of a phillips screwdriver into the fill port hole and turn the port counterclockwise. Once the port loosens, you can take it off by hand the rest of the way. After you've unscrewed your old fill port from the end of your tank, thread in this quick-disconnect fitting & o-ring (included) to seal the connection. No need to depressurize the tank because the tank has a check valve.
 
"NeilClague"Thanks for the info, having never owned one before I am not familiar with dismantling them and thought the connector might have the valve inside it. I will check out the PA site and see if they sell them for the Sumatra's, I am sure they do as they sell quite a few different connectors, thanks again, Neil.
I left a link to PA where you can buy the item in my earlier response. There's other places that sell them but most sell for the same price. It only takes 1 minute to install the foster.

 
"Ted"I have yet to hear a scathing review of a Sumatra. Everyone who owns one loves the darn thing. :)
I would like to know if they have a proper shot curve (bell shaped). My issue with the Evanix line is that the first shot is always the hottest, and it slopes downhill from there. It says to me that the hammer and valving are not in harmony.
Hi Ted
Have you reviewed a Sumatra .22 by any chance? Will like to hear your thoughts