As a Refining Master, Making an AK Is Only Natural

[Mortal cultivation, traditional fantasy, Eastern xianxia, no female lead, decisive and ruthless] Lu Yu transmigrates to a cultivation continent and, after much effort, enters an immortal sect, only to discover he has no spiritual roots and can only become the lowest kind of body cultivator. Fortunately, he is skilled at crafting artifacts and has obtained an iron basin that can restore objects to their original state. Body cultivators lack ranged attacks? No problem. I've got guns, cannons, and bombs! Body cultivators can't fly? No problem. Why not make myself a pair of wings?