What's everyone's favorite cold weather lube for their AR style rifles?

Realize colds relative,but let's say 15 deg F to -15 deg F. Between deer and coyote hunting these are temps I might see. -15 would be during coyote season.

Sometimes cabin fever will have a man out in the cold....

I use Eezox synthetic gun oil on mine, have been out in temp as low as -9 with no issues.

powdered graphite
RR

Thanks for the scoop guys. Maybe changing to the AR this season will bring some luck. Between near record snowfall last year and too many fu&%#&!ng wolves think its going to be rough season.