The blackwall BFG AT KO LT285/70/17 that weighs 56 lbs., and comes w/o the severe weather rating, are an OEM tire spec'd by Chrysler, (on the BFG spec sheet there's a DC).
One other AT KO OEM spec blackwall, is the LT315/70/17, also w/o the severe weather rating, and is GM spec'd, (I think for the Hummer II).
Besides the less capable snow performance, I would be concerned about treadlife on both of these tires, since they are an OEM spec, and most of us don't have real good feelings about, (at least about the Nissan), OEM spec tires.
My guess, which is total speculation on my part, is the tire manufactures give the OEMs a very good deal on short tread wear compound versions, so they can sell almost everyone a new set of tires within the first two years of ownership.
Although this causes some to never become an aftermarket customer of a particular brand, there are enough crap OEM tires out there from all brands to even things out, and all tire manufactures end up benefiting by this huge group of new car and truck buyers, buying a new set at 2 years instead of a 4 years. Again my theory is just speculation.