East German KM-87 Bayonet
This is not most rear AK related bayonet and it is not most expensive AK related bayonet, but among collectors it is grail. You may have ten most rare AK related bayonets, but someone will always ask you: Do you have KM-87?
It is last East German model of AK related bayonet.
So here it is… KM-87 🙂