We take a Sig MCX, Krebs RAS-47, Colt 6920 and a Beretta ARX100 out, get them wet and let them freeze. Then we see which ones work.
MAC Patches: https://www.coppercustom.com/product-category/clothingapparel/patches/
BCM Watch: http://www.bravocompanyusa.com/BCM-MK15-Tritium-Watch-Limited-Edition-p/bcm-mk15-watch.htm
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