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
KitchenAid mixers before they got cheap
I inherited a 6" Wilton vise from my dad. He's still alive but I convinced him to pass it on to me early because I had a couple projects it would be super helpful on. And maybe a little bit to beat my siblings to the punch.
Zippo lighters.
My dad also has a Lincoln Electric welder that will last to pass onto another generation or two. He still uses it though and again, I probably have a sibling or two who would also appreciate having it.