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
It has some fancy features to allow for custom heating presets among other things. Also, it means you can easily repair/modify the hardware for whatever reason you might come up with.
The ironic part is that you’d need a second soldering iron to do that.