This is a year-old champion concept that I found and decided to post. I've noticed it shares some similarities to Lucian due to both of them being based on having two handguns and also has some elements of transformation (Jinx) but I think that at the same time it's a completely different champion. Take note that I still can't think of 2 E abilities for him that fits the rest of his kit as well as not being that OP.
EDIT: Moved passive to ultimate and changed it, made a new passive for him. Gave Q CC an AD ratio. Moved Tactical Repositioning to E. Multiple fixes to template names and inconsistencies. Abilties now cost mana.
EDIT 2: Further tweaks. New gunslinger form W ability. Slight refining of Q ability and removed AD ratios from CC. R slightly tweaked.