Doomsday Gunslinger, I Can Upgrade My Firearms Infinitely

When the doomsday comes, the protagonist Lin Feng struggles to survive in despair, witnessing the ugliness of human nature and the horror of zombies. In a life-and-death crisis, he accidentally awakened the "infinitely upgraded firearms" system. Starting from an ordinary pistol, he embarked on the road to upgrade. We didn't fight many zombies, but in the end they even went to heaven. It imitates the style of Internet articles from ten years ago. If you don't recommend it, you can take a look. There is no heroine in the traditional sense. The heroine here is responsible for the narration.