The Fists are useable only if equipped with the Cellphone, and Pistol Whip only usable if equipped with a firearm. It's useful to save ammo, but it's weak.
Pistol whipping with any rifles-type weapons (Remington 870, FAMAS, M16, Hunting Rifle, etc.) will not deal any damage, but only push the enemy away. It can't even break planks, and it depletes a small amount of stamina.
Pros and Cons
- Moderately fast, but slow compared to other methods.
- Doesn't affect accuracy unlike other melee weapons.
- Doesn't take up inventory space.
- Almost always available.
- Weakest weapon in the entire game.