What does aks stand for?

AK = Alaska (it's the letters used to represent the state) - they call the collection AK because it is meant to represent that the kit in that collection can survive extreme conditions as found in Alaska. :-)

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In the case of the firearm (AK47), AK stands for Avtomat Kalshnikov. Avtomat is Russian for automatic, and Kalashnikov is the last name of the inventor.