From the Start, Selling Arms in Another World!

In the Starfall Empire, legend has it that a Saint Realm powerhouse fell here tens of thousands of years ago, giving the empire its name. A week ago, a building utterly out of place in the city suddenly appeared on an empty lot in the northwest corner of the imperial capital. Three gold characters were written across its signboard: Armory. At first, nobody paid it any attention. But as firearms spread and the Starfall Empire’s power grew, powerhouses across the continent grew anxious and flocked there with mountains of spirit stones. Some even thought about destroying it if they couldn’t get their hands on it. But what kind of place was this? This was the mightiest armory, equipped with the most powerful firepower System! Even the gods would have to kneel!!!