Cold Weather Gun?

I've been contemplating what kind of rifle I could leave in the truck this time of year.  Today is insanely mild (if it gets any warmer, stuff might actually melt!) but just a week ago I was doing a felony stop in -30ºF windchill.  With that in mind, I've tossed together some parts I had around the house, and ordered a new stock to throw on it.

BCM middy upper I won in a raffle a few years ago, fixed rear sight off the M&P15-22, and some Magpul grips, and their Fixed Carbine Stock, which has the same length of pull as what I set collapsible ones anyway.  No electronics to die in the deep-freeze.

The plan is to keep an eye on the weather, and swing over to the range one of these days when it's freakin' cold out again, with the gun in the back so it stays nice and cold.  I'm just debating what lube to use (the last time I was shooting ARs in -20º or lower temps, it was noticeably sluggish with CLP.)

Blarg

Been working steady overnight shifts of immense boredom.  This tends to destroy most of my creative abilities... if'n you've been wondering about the lack of posts as of late.

The truck goes into the shop after I get done with this shift though, and it's my Saturday (for lack of a better term,) so maybe I'll get something more substantial up.