The Strongest Gun Magus: I Cast Bullet!

“Why don’t wizards just shoot each other with guns?” many people on Earth wonder. When Reynard died on Earth and was reborn in a world of magic, he became nobody. He had no parents, no system, no special bloodline, and a magical aptitude that only let him advance in magic by consuming expensive materials. Materials that he could never afford! So instead, he crafted a gun. Oh, you want to cast a spell? Then I cast bullet! From the most hopeless student, Reynard turned into a feared magus. But his path to riches and power was still full of peril! “Ah… why can’t I just stop pissing off wrong people and seducing wrong girls?” — Description from novelcodex.org