A friend claims that I don’t need to lube my Nickel Boron BCG, Is this true?
I think the general consensus here regarding your question is a resounding “no”.
Metal moving against metal = needs lubrication.
That was my thinking also.
In my experience, you actually need more lube than with a standard phosphated BCG. I had a Fail Zero BCG. It worked fine, but it was stickier in the upper than my BCM BCG.
There is no shortage of threads on this very subject. You already have the short answer.