ATK (Alliant Techsystems) has announced that it has acquired Composite Optics, Inc. (COI), a leading supplier of advanced composite products for the space and aerospace markets. Terms of the transaction were not disclosed.

Headquartered in San Diego, Calif., COI has annual sales of approximately $70 million and approximately 450 employees. The business will remain in San Diego, and will be integrated with ATK’s existing composite structures operations.

COI composite products include telescope structures, optical benches, mirrors, instrument housings, satellite structures, and antenna reflectors. They serve as integral parts on a number of spacecraft, including:

Earth observation and weather satellites such as Landsat, Quickbird, and SeaWinds.

Scientific space platforms such as NASA’s Hubble Space Telescope, Chandra X-ray Observatory, and James Webb Space Telescope, the European Space Agency’s FIRST telescope, the U.S. Air Force’s Airborne Based Laser and Space Based Laser, and the Mars Global Surveyor.

Paul David Miller (PDM), chairman and chief executive officer, said the acquisition of COI continues a series of strategic transactions aimed at bolstering ATK’s core propulsion, composite structures, precision systems, and munitions businesses.