Sorry, but many are going to say we need more information like:
Budget for rifle... (really makes a huge difference in choice)
What optics planned (if any)... (also makes a huge difference regarding budget)...
Expected accuracy (MOA, 2-3MOA...)...
calibre wanted (.223, 308, 7.62x39...)...
Will you be hunting and if so how large of game...
Do you have plans to be in competitions of any kind...
These are a few of the questions needing answers if one is to make an accurate choce of what NR black rifles would be suitable.
There are a few decent NR Black rifle choices, but I don't feel any one NR rifle has it all like I believe an AR is capable of (minus the NR status of course).
I suppose a Swiss Arms could do it all, but there are NR issues (to put it lightly) right now with that particular rifle. Your budget will dictate what rifles/optics you can choose from and then the level of accuracy you want along with calibre choice will be other determining factors.
Many may suggest XCR-L/XCR-M rifles as a decent do it all NR semi.-auto. It comes in multiple calibres and has many happy owners, but does cost well over $2,000 before tax and optics.
If your more budget minded and don't plan on hunting, perhaps a pistol calibre semi.-auto. rifle like the 9mm JR Carbine for under $1,000?
Please give us some info. to help narrow down the list.
Cheers D