Raytheon, an RTX business, has won a contract worth up to $6.3 billion to produce and sustain Standard Missile-3 (SM-3) Block IB interceptors for the U.S. Missile Defense Agency.

The agreement covers five years and includes options for two additional years. It is intended to replenish missile defense inventories used in combat and strengthen protection for U.S. forces and allies.

The SM-3 Block IB is a ship- and land-based interceptor designed to destroy short- to intermediate-range ballistic missiles during midcourse flight. Production will take place primarily at Raytheon facilities in Tucson, Arizona, and Huntsville, Alabama.