So, I gave up making the whole thing all at once and changed my plans into assembling it from parts.
In my previous life, I was a military otaku; I had a special admiration towards modern weapons.
Also because of having worked in a metalworking plant, before being reincarnated, I often dreamed,『will I ever be able to make my own guns?』
Looking at diagrams of revolvers, automatic firearms, assault rifles and such, comparing them with the machines and technology used in the factory I work at, I felt that making them was possible that time.
It was one of my hobbies, grinning while drinking in my single room.
Now that I had my hands on magic liquid metal, making handguns was no longer a dream using the knowledge and technology from my previous life.