Gejin-114 is one of the weapons invented after the Apocalypse, specifically designed to deal with high-level zombies that are hard to kill with ordinary firearms!
It's not a cannon or a quantum weapon, but a machine gun, yes, you heard that right, it's a machine gun, but it's not one that can be carried by a human. This gun uses materials developed by Chenhua Technology during the Apocalypse.
Bio-steel!
Chenhua Technology is a company that specializes in researching biological genes. The arrival of the apocalypse brought anti-life matter, which made people become zombies, into their view. After a long research, they found that anti-life matter doesn't only turn living or dead beings into zombies, it can also alter the structure of materials.
However, this alteration is not active, it requires external catalysis to start changing the material itself.
