The first of a new series of SMART weapons. The Grinder incorporates a processing unit that can generate a strange particle field. The field causes the bullets to somehow lose mass for a short period of time, reducing weapon recoil and ultimately resulting in an increased operator movement speed.
The Grinder features a very high damage rating coupled with an extremely high rate of fire, rivaling the Stacker, along with maximum armor penetration, giving it one of the fastest times-to-kill of any automatic weapon in the game. Like the Stacker and the Enforcer, however, it's accuracy rating is lower than that of riles such as the KOG V or PR39, and it cannot equip a grip, making it optimal for close-mid range combat. In spite of this, however, the weapon has low recoil and in practice performs decently in longer range engagements even when hip firing, and it's ROF helps to compensate for its below-average accuracy; a silencer can also be equipped to improve accuracy.
In addition, the weapon features a unique SMART mechanic resembling the the mechanic of the Stacker, in which each successful hit increases the shooter’s movement Speed by 2%, which can be stacked up to 10 times. Each stack lasts up to 20 seconds.
The Grinder's rate of fire statistic is misleading, listing it as lower than that of the KOG V and the Enforcer, however in practice the weapon will empty a 45 round magazine in just over 4 seconds, which gives it a ROF in the range of 600 RPM, among the highest of any automatic weapon in the game, and superior to that of even submachine guns.
Some players considered the weapon overpowered, due to its insane rate of fire and time-to-kill combined with minimal recoil and solid effectiveness at all ranges.