Halo 4 Assault Rifle 3D model?

Hello,
This is my first thread and I was wondering if there was a 3D model. So I want to build a Halo 4 assault rifle by CNC machines, BUT I can’t find a 3D model that works with CNC. I found a BR one, but I didn’t really want a battle rifle. .obj don’t work for me by the way, I don’t think it does anyway. I would be grateful for any help. Ive tried 405th.com but they don’t seem to be any help. I use FeatureCAM, but if there are any other software that I can use, please tell me.

Thanks!

Sounds difficult, good luck!