Building Mecha in Another World

I'm Building Mechs in Another World.

Qin Feng, a senior programmer, dies suddenly while fixing a bug and transmigrates to another world.

In this world of swords and magic, he is rescued by an elf.

Just as he's preparing to repay the favor, he learns that a week from now, a black dragon will attack the town.

At the same time, he discovers the magic and golems of this world.

Gargoyles?

Iron golems?

What the hell are those?

With technology like this, shouldn't they be building mechs?

Mechs are a man's true romance.

But there's no time to build one now, so Qin Feng decides to start with something simple.

A week later, as the black dragon attacks the town, a black-and-gold anti-materiel sniper rifle is set up high above the streets.