Walther cp88 nickel slide leak problem

[valboskie]

Hi there
I'm looking for some advice I bought a cp99 and when I put a co2 bulb in it just leaks out very quickly.
I seen on chambers you can buy a valve assembly complete.
Does this include the hammer hammer spring seals ect.

The valve comes out on what would be a mag clip in a proper pistol.
Here is a picture there seems to be some damage around the firing pin hammer.

Can I just swap over the whole unit for a new one.
It's only 2 pins
http://s833.photobucket.com/user/val...ke3k3.jpg.html

Also can anyone tell me where I can get the part I need .

Any help and advice would be greatly appreciated
Cheers
David