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
Japanese-made sewing machines from the 1950s. Most are all-metal and overbuilt, and will work like new with a few drops of oil, maybe a fresh belt. In the US they were imported and had local brand's names put on them; what you're really looking for is the "Made in Japan" on the back or bottom. Granny sewing machines also qualify, but most of the Japanese ones have zigzag