Developed and published by Capcom, Resident Evil 7: Biohazard is a survival horror video game. It is releasing on Jan 24, 2017 for PS4 and Xbox One. Below is the complete weapons list in Resident Evil 7 (known as of now).
Resident Evil 7 Biohazard Weapons List
Knife
Standard, foldable pocket blade. Available in the first hours of the game
Handgun
Pistol that you will get early on. You’ll have to keep an eye on the ammo.
Shotgun
Pump action shotgun, perfect for dealing with enemies up close.
Chainsaw
Melee weapon, with the caveat that fuel is limited.
Flamethrower
DIY flamethrower.
Submachine gun (PP-19 Bizon)
Russian-made SMG.
Circular saw
Insta-killing, difficult to wield melee weapon.
Magnum
Revolver with a lot of stopping power, but slow to fire.
Grenade Launcher
Launcher for explosive cartridges of your own design.
Albert-01
Hand cannon, literally. Obtained during the final boss fight.
You can find the complete Resident Evil 7: Biohazard Guide here.