The M1A2 SEP (Tank, Combat, Full Tracked, 120 mm Gun M1A2 System Enhancement Package) is a modernization of the American M1A2 Abrams main battle tank developed in the late 1990s as part of the SEP project. It is an upgrade of previously built M1A2 Abrams tanks, incorporating a number of enhancements aimed at improving maneuverability, combat endurance, and overall combat effectiveness. To accomplish this, an updated second-generation commander's thermal imaging device was installed along with a new eye-safe laser rangefinder, both integrated into a digitized map system displayed on a color monitor. According to the military, the maximum firing range was increased to 4,000 meters. In addition, some units received reinforced front and side turret armor.

The M1A2 SEP was introduced in Update "Fire and Ice". Compared to its "younger brother," the M1A2 Abrams, it receives a second-generation thermal sight and the option to install the "TUSK" (Tank Urban Survival Kit), which enhances the vehicle's side protection using "ARAT" explosive reactive armor blocks. Thanks to these improvements, playing with the tank becomes much more comfortable than with earlier "standard" variants of the Abrams. On the battlefield, the M1A2 SEP is a versatile tank that performs well in both active, aggressive gameplay and defensive engagements. Additional reactive armor blocks further improve its already good survivability, and the higher-quality thermal imager makes it easier to detect opponents at a distance and in poor weather conditions. However, key protection issues inherited from previous generations of the tank have not been resolved—the tank's hull remains a vulnerable spot even to earlier APFSDS rounds, forcing players to hide it behind terrain features.