Something occurred to me while pondering these keyed tang replacements .
Let me propose a scenario (always fun

):
Captured weapons in the field; some may have been confiscated but some may also have been destroyed on the spot .
How do you make the kris unusable ?
Break the tang .
A small unit in the field could not afford to be weighed down with every confiscated weapon on a patrol or after a skirmish .
Just musing ..........