Are you using a dedicated or a listen server?

dedicated

If you extracted the addon using Gmad, then deleting the files should work. Make sure there isn't a duplicate of the weapon you are trying to delete anywhere in the server.

Nope. They're still there.

And edits I make to files don't apply.

You should check, if you have the rights to delete/edit the files. Try deleting them as an admin or check if the folder/files aren't protected.

@Piscaso That's pretty odd man, I'm not sure why the weapons are still showing up. And sorry for the delay in response, I've been really busy lately; I can try to help you over Skype sometime tomorrow if you would like, but other than that, I'm not sure why they are still there.

@yanbo Thanks for trying to help.

I don't know if this issue is already fixed but I'm almost sure the issue is that you havn't synced your fast dl, after you've deleted the lua files of them. That's what worked for me and should work. Btw you also should uninstall this addon from your personal client.