"A custom part for the flamethrower. Restricts liquid fuel and compressed gas usage, making it possible to fire for much longer."
— Inventory description
— Inventory description - Japanese
The Regulator (Flamethrower) is a custom part in the Resident Evil 2 remake.
It upgrades the Chemical Flamethrower so it burns fuel at a slower rate, allowing the player to shoot for longer.
This upgrade is found in the laboratory in the Nap Room in one of the lockers.