
1) Korean invention 2) Traditional Korean weapon
Found on
https://www.crosswordclues.com/clue/pyeonjeon

Pyeonjeon, or aegisal (baby arrow) is a small archery bolt, fired from within a longer bamboo shaft, allowing the use of a full sized bow to propel a short bolt. A unique creation in the Korean archery, this weapon was considered a national secret during the Japanese invasions of Korea (1592-1598). The pyeonjeon made it impossible for the enemy to...
Found on
http://en.wikipedia.org/wiki/Pyeonjeon
No exact match found.