It's the only other intermediate cartridged black rifle that is NR. I guess there is that fame now, bit unproven though. If the swiss wasn't prohib that is my pick, but with that debacle I can't recommend it, well because no one can buy one anymore. And G36 are rarer than a teenage virgin and cost an arm and a leg if you do find one, if the guy was looking at the 7.62x39 guns the vz58 is a solid choice, I really liked my cz858. But that's an irons only sort of deal, because I couldn't really find an optics setup that worked properly with it.
My rambling aside as far as the nr black rifles go your choices are tavor or xcr. And between those two, the tavor is my pick... Or wait and see what happens with the HK243

, that's what I'm doing atm. The t97 is a nonentity as far as i am concerned, well any norinco for that matter.