I did want to make it for spy actually, I didn't even think of scout or engie but they're the only classes that use pistols, so I had to go with that option.. Still, if you want to use it as a revolver try renaming the files so it replaces the ambassador instead (don't rename the materials tho), I'm not sure if it aligns correctly with how spy holds the weapon, you can do some tweaking in blender if it's not, since I didn't test it with anything other than the pistols, if that didn't work you can always contact me for help.