The Grease Gun is the first SMG and gun unlocked in the game. The player gets it free in the tutorial.
The grease gun has a fire rate of 10 rounds per second. The grease gun has a mag capacity of 30 rounds.
It has a slow rate of fire and has bad accuracy, it is best to buy a different SMG as soon as possible instead of keeping this.
The real name is M3 Submachine Gun