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MRM-KE is designed for 105mm and 120mm cartridges and comprises an interchangeable sensor component using multi-mode Semi-Active Laser (SAL), GPS and MMW guidance, a common rocket motor and a kinetic penetrator packed into the warhead section. The MRM will be fired by a tank as a conventional round, as it starts it flight, the round will acquire GPS position followed by mid-course updates and at the peak of its trajectory, ignite the rocket motor to accelerating to achieve maximum lethality. The round will be able to maneuver by employing impulse thrusters to maneuver and hit at the target's center. It is designed for effective range of up to 7.5 km. MRM-KE was first tested in August 2004.

MRM CE - Raytheon, developing a CE version of the MRM fitted with a SAL seeker, performed a first successful test of the new projectile in June 2006, fired at a moving tank at a range of 8.7 km. The semi-active laser seeker projectile survived gun launch, then acquired, tracked and maneuvered toward the moving target. This was the first test shot in a planned series of SAL projectiles fired from a M1A2 SEP as Raytheon continues to mature its semi-active laser seeker capabilities. The MRM-CE will be able to engage battlefield targets at extended ranges, including beyond line of sight, autonomously or designated with external laser target designation. The MRM-CE is a key component of the Army's FCS (Future Combat Systems) vehicles and a potential spin-out to M1A2 Abrams SEP.