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
Baofeng AR-5RM Handheld Radio. Costs under 30$ and is extremely useful and versatile. Can pick up just about any frequency youd need, VHF, UHF, AM, FM, GMRS, etc. and while not waterproof its built very tough. Could probably use it to beat somebody to death then pick it back up and have a conversation on it.