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
Concept2 rowing machines. Even if they break, you can still buy spare parts at reasonable rates even for the very first model, which is decades old and only sold a few copies. Fantastic engineering.
It’s a real baader-meinhoff phenomenon: once you notice them, you notice that every gym has them.