L-Brain Sidework manufactures low-tier weapons, based on real life.
The first company to originate during the second phase of the SANI. Organized manufacturers became easier to establish, and thus a few groups of survivors who knew metalworking decided to form L-Brain Sidework. This company is known by many to be the de-facto manufacturer of cheap, and yet high quality weapons for new survivors.
Hellish Night manufactures low-tier weapons, based on fictional life.
R-Brain Hardwork manufactures high-tier weapons, based on real life.
After L-Brain Sidework gained popularity, supplies, and more workers, they decided to create higher quality weapons. To distance themselves from their older and now lower quality company L-Brain Sidework, they formed R-Brain Hardwork, which creates much higher quality weapons, albeit at a higher price.
Heavenly Day manufactures high-tier weapons, based on fictional life.
As of now, there has been no proof of weapons that have been released by them, but there is proof that they exist. A secretive company that is rumoured to be creating prototype high-tech weapons.
K177 manufactures exclusive weapons, only granted to the elite of the apocalypse.