Standard Missile MK104, MK72

Aerojet Rocketdyne produces two solid propellant rocket motors for the Standard Missile (SM). The Mk 104 rocket motor is used on the SM-3 and SM-6 missile as a second stage, and the only stage on a SM-2 missile. The Mk 72 rocket motor is used on the SM-3 and SM-6 missile as a booster or first stage. These rocket motors are combat-proven, and provide the U.S. Navy and the Missile Defense Agency air and missile defense capability.