LoL Models in other games?

Hi! I'm here to ask a thing about the copyright on the models, so i have a game called SecondLife where i have an avatar really looking like Jinx! I made this avatar with many parts from the shop and mesh models created by me too. Now, i really want to use Jinx original guns as accessories (while i create my version of them) but i don't know if i have the rights for upload them for me and for my other lol player friends, if yes, i can give to others for free and say that is a copyrighted thing (that i have ask to upload) and i haven't created it? Also if i can upload other things from lol with the same policy?