I don't think so... and if there are FUCK invite me. I don't think they even exist....
There are no private server
This made me very very curious and this is what I found which I wonder why I didn't thought of it...
1. You don't have Nexons Combat Arms Server Files.
2. Since you don't you would have to Script them yourself.
3. Can you script? To the point of professionalism to have a running server?
4. If yes then this can take a few years.
5. Do you have a computer which you can run as a server if you ever get a working version up?
6. If not then give up the money to buy one. If you have money just end this now.
7. Would people play an already FREE game. If you made one?
8. What do you have to offer that Nexon Doesn't?
9. If your going to add more guns; Can you model; Can you make sounds; can you script that gun.
10. If you said yes to all of these. Just go make your own damn game. ffs...