The SIG MPX SBR Custom is a unique 4-round burst submachine gun. It offers excellent battle characteristics as an extremely high damage per shot, an impressive rate of fire, good accuracy, and decent range. It also has the highest limb damage multipliers for any submachine gun in the game, making it extremely powerful against targets wearing protective gear. This, coupled with almost non-existent recoil, makes it an extraordinarily versatile choice for any situation, provided the user is able to adapt around the 4-round burst system.