gun.zip contains the following:
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gun1.map, bomb.wav, targetdest.wav, dish1.wav
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Installation:

In order for the sounds to play correctly you must put them in your baseq2\sound dir.  If you want to use this in a mod or custom directory, you must change the target speakers to reflect their new dir.  
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Legal Stuff:

You may use this prefab for any non-profit projects or for distribution.  If you intend to use this otherwise please let me know.  Otherwise just be sure to include this readme with the file.  