Give Another World a Little Hot Weapon Shock

Thermal weapons + technological development + farming + confrontation with magic + steel torrent + lack of firepower at the end of phobia Why did he travel to another world and become the eldest son, and then be exiled to the desolate northern border? But fortunately, I have a system that can help me develop technology. But the problem is, this is a world full of magic. Magic, fighting spirit, etc. Are all real! But it doesn't matter, I will tell them. Caliber is justice, range is truth! Let's take a look at how a person in the final stage of phobia about lack of firepower develops technology step by step through the system, crushes all enemies, and establishes a unified dynasty.