Did you find your gun sounds? I've got these from a project I attempted (and failed) to make long ago. They're in .ogg format. If only I could remember where I originally found them.
E: Actually they appear to only be the bullet ricochet sounds. Oh well.
Oh and I really like that you're making a nostalgia mod.
It's a shame about the sound quality but perhaps there isn't much you can do about that. Otherwise, it's really good work.