Is jhin's gun or guns hextech?

Jhin's gun, Whisper, is hextech and comes from the Kashuri armories. Where they got it (or whether they made it) is unknown. On the map of Runeterra, Kashuri is a place in Ionia. I've read that Whisper isn't a particularly complex hextech weapon (as opposed to Caitlyn's for instance), but it is possibly the most powerful one.

Edit:

{quoted}

The Kashuri Armories have been making weapons for a long time--mostly swords and bows. The war changed that. They began making poor copies of hextech weapons during the war. Now they have been "inspired" to make new weapons harnessing the abundant magic in Ionia. Hextech uses a little bit of magic very efficiently. Jhin's weapons use a lot of magic.

Like others are saying, it's not really hextech.