MTL is a vehicle manufacturer that features in GTA 6.
The company made its first appearance in GTA 4, returning in Chinatown Wars, GTA 5, and GTA Online.
MTL is confirmed to return once again, with 
MTL is known for its range of heavy utility vehicles, ranging from flatbed trucks to armored vehicles and fire trucks.
It is thought to be based on real-life brands such as Mack and MAN SE, which are known for producing similar heavy-duty vehicles.
The company’s name, MTL, is likely inspired by the word Metal, a nod to the strength and durability of its products.
This is further evidenced by a similar in-game company being named HVY, which could be a reference to ‘Heavy Metal’ when the names are viewed side-by-side.
