This winter in New York (as with the rest of the country) was abnormally cold so I decided to try a little test as to the reliability and functionality of the KRG Bolt Lift in what I consider extreme cold.

I learned in a past winter with my 700 SPS Tactical that the stock bolt knob was a PITA while wearing gloves.
When I saw that one night had a forecasted low of -5F I left the rifle in my trunk overnight. When I got up at 0600 (to feed the chickens) I removed the rifle from my trunk and fired through a 10 round magazine with out any hiccups. That morning was a balmy -12F so after I collected my brass (and eggs for that matter) I went inside to thaw out. I left the rifle in the same room as my wood stove where it was about 80F. Around an hour later I looked it over and the Bolt Lift was still firmly attached. I repeated this freezing and thawing process another 5 times that day and the Bolt Lift held firm.
Since I used no epoxy on mine when I installed it I was worried that it might work it's self loose if the temperature changed drastically due to the metal and polymer expanding and contacting. Needless to say that is no longer a concern of mine.
I also use Eezox exclusively as my lubricant/rust preventative and I can state with authority that it's not temperature down to a least -12F.