while im not a 'military guy' i do live in the high north and do run a couple AR's.
i was surprised when i had my AR freeze up on me while shooting one day.
i honestly never considered the fact that a gun would freeze up.
just never dawned on me, the whole heat and fire thing made me think they didnt freeze up for some reason.
anyways, rude awakening on my part.
i did some reading and got into a neat article about the RCMP testing cleaning stuff and oils for their guys.
one of the ones they recommended was G96.
i looked into G96 and liked what i saw so i picked some up and i havnt looked back.
stuff is great!
ive ran my AR's at -50 last 2 winters and didnt have any problems.
i know a lot of the guys up here have switched over to the G96 line as well and i havnt heard of anyone having any complaints.
if your planning on going colder then -50 i cant help ya, you'll have to get ahold of someone north of Yellowknife for that.
edit - just checked their webpage, they say this;
G96 Synthetic CLP gun oil is rated at -74F
so in Canadian that would be -59/60