Jinx is shown in this image on the right side to be holding and fleeing with the Kraken Slayer, showing it to be a (potentially even ship mounted) harpoon gun used for fighting sea monsters. It's sleek and long to hold the entire harpoon.

Maybe something for a future update? Sorry if this sounds pedantic, I am very into the lore of these things. The other 3D models are great.

Not sure how to add labels

Also pictured, which have gotten obscure or no representation elsewhere, are Eclipse and Immortal Shieldbow among a few others.

Thanks for the image, it's nice to have something more to work with than just the ingame item icon. I'll make a change when I can.