Hi I have a cm16 Mod 0. I can tell you now that the only difference in the Combat Machine line is inner barrel length and what it looks like. The mod 0 had a very nice magpul style handgaurd and adjustable stock. It's a VERY comfortable weapon to hold and it's pretty good for mostly medium range. Oh and don't be put off by the fact that it has no RIS Quadrail like the raider of anything this makes it more comfy to hold. Also only other major difference between the raider and the mod 0 is on the raider the battery gos inside the stock and the mod 0 battery gos inside the handgaurd. Hope this was usefel. Reply to me if there's anything more you want to know about it 😄. Happy Shooting.