There were a few fantasy novels in which the protagonists used guns as weapons, such as "Sniper Cultivator","My Justice Is Within Shooting Range", and "Douluo: I Don't Want to Be a Spearman". However, it should be noted that Sniper Cultivator and My Justice is Within Shooting Range were fantasy novels, while Douluo's I Don't Be a Spearman was fantasy novels. I hope you like my recommendation. Muah ~