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
My Yamaha f310 guitar. It's supposed to be a beginner model, but I never felt the need for anything else. Took it with me traveling and after some 15000km on the road still sounds as on its first day.