GURPS Fantasy-Tech 2: Weapons of Fantasy

[malloyd]

Originally Posted by Fred Brackin

That may have originated in Gene Wolfe's Book of the New Sun which means it's in the Gurps version too.

http://www.sjgames.com/gurps/books/newsun/

It showed up in a D&D 3.0 gear book too. So it's been around for a while.

The original inspiration may be the mercury filled bullet in Day of the Jackal (1973). No that doesn't work either.