Since Treyarch never got around to fixing these sounds, I thought I'd provide them for you all to enjoy!
This simple fix, provides all the missing sounds from the raygun mark 3 and the PPSH.
All instructions included in download.
Make sure you compile after installing.
If you have any problems, let me know.
Be sure to credit me and the other amazing people below if used.
Here's an example of the fixes I made in V1.1:
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