This is not a conversation about guns. This is a conversation about items that have withstood abuse that are near unbreakable.
Some items I have heard referenced as AK47 of:
Gerber MP600: It’s a multi tool
Old Thinkpad Laptops
Mag lights
Toyota Hilux
Salt.
Good take on the question
It’s funny how it used to be expensive. In Danish we have a saying to say someone is poor if “they can’t even afford salt for their egg”, as if an egg is cheaper than salt. Because it actually used to be that way.