Sub Zero Shooting AR-10T

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12 years 10 months ago - 12 years 10 months ago #10282 by Syphin
So i have an AR-10T 338 on route and plan to use this during winter. I do not plan to hunt in temps colder than -30F but could find myself in temps down to -45 while in the field.

Are there any issue with firing the gun at these temps i should know before hand?
Last edit: 12 years 10 months ago by Syphin.

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12 years 10 months ago #10287 by jtallen83
Have you checked out Armalites tech notes? I had the same type questions when I bought mine. Researched showed me that lube and powder choice were the only real info available that related to cold temps. From what I could see the best advice available is there on the Armalite site.
I've been waiting for one of those super cold blizzards to take my AR-10 out and see how things behave but mother nature has given us a fantastic reprieve, I'd gladly wait tell next year before adding my results to the post!
I'm sure you'll get some first hand information by the end of the weekend. I know there are several here that hunt northern climates.

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12 years 10 months ago #10289 by Syphin
Replied by Syphin on topic Re: Sub Zero Shooting AR-10T
AR-10 Errata sheet

So i check them and nothing. I did find an interesting Errata sheet "This errata sheet provides information that isn't contained in the AR-10 Owner’s
Manual, or highlights information that is extremely important"

Should come in handy for noob like me.

This was the most complete info i found. They were using an AR-15 though and i personally do not know the difference between AR's.

"The coldest I have used military issued weapons was negative 56 degree F. (Fort Greely AK.)
M16s worked with all the lube removed, but would jam up when removed from a semi-warm M-113 A-Cav. It would eventually work again when all the metals became the same temp. Break Free becomes thick and glue-like at those temps.
Arcttic brake fluid or kerosene works well as cold temp lube.

The coldest I have used personally owned weapons was Neg 76 F at Fort Yukon Ak,
(Winter of 82-83).
My S&W m-25-5 revolver jammed rock solid when I pulled it out from under my parka. (trying to shoot a rabid dog.)
A tiny bit of petroleum based lube acted like a weld. I later cleaned it with acetone and then lubed it with silver dry graphite.
My 1911A1 did not like to fire more than a couple shots at that temp. My personal AR-15 patrol car gun did not work at 76 below, but my Finnish Valmet M-76 FS did when I dry lubed it.


Cold Weather Firearms Lube Test with a Stag AR chambered in 6.8mm SPC.
Negative 20 F.

Tetra Gun Lube.........................................Very slippery but semi thick
GS-96.......................................................Works well, semi dries.
Penn Synthetic Reel Oil P/N 92340 Very Fluid, Extremely slippery
Marvel Mystery Oil Very fluid, Very slippery
3 in 1 Oil Fairly fluid, somewhat slippery
LPS-2 Fairly Fluid, somewhat slippery
Klean-Bore Formula 3 Some separation, fairly fluid, somewhat slippery
Tri-Flow Separated, does not adhere or film on metal
Break-Free Separated, somewhat tacky and semi syrup like
Mil-Tech Thick, somewhat tacky, syrup like
Outers Gun Oil Very thick syrup. Tacky
Mil spec MIL4-46000c Lube Oil Separated, some was in thick jell state.
Rem Oil Thick jell, tacky
Boe Shield T-9 Thick Jell, tacky
Corrosion X HD Thick jell, tacky
Ballistol very thick jell. Separation
Exxon Elite 20-50 Syn Av Oil Very Thick, glue like
AeroShell 15-50 Semi Syn Av Oil Very thick, glue like"

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12 years 10 months ago #10291 by jtallen83
Im would be curios to see how the new Otis Special Forces Dry Lube works in the cold. It is pricy stuff but does dry completely.
I was never stationed in Alaska but did some cold weather training while in the Rangers, never had a blip with my 16 or my m-60 but then I'm not sure how cold it was.
Thanks for posting the lube/temperature info, good info to have.

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