SACRAMENTO, Calif., June 27, 2012 (GLOBE NEWSWIRE) -- Aerojet, a
GenCorp (NYSE:GY) company, announced today that its rocket motors once
again successfully contributed to the second consecutive intercept test
of Raytheon's Standard Missile-3 (SM-3) Block IB. During the test, the
missile intercepted and destroyed a ballistic missile target. Aerojet's
MK 72 booster and MK 104 dual-thrust rocket motor provided the first-
and second-stage propulsion while Aerojet's Throttling Divert and
Attitude Control System (TDACS) maneuvered the SM-3 Kinetic Warhead
into the target for the final hit-to-kill impact.

The SM-3 Block IB missile incorporates kinetic warhead improvements to
increase the SM-3 Block IB missile's capability against current and
emerging target threat sets. Aerojet incorporated its throttling solid
rocket technology advancements into the TDACS design to provide
increased mission flexibility to the warfighter while maintaining the
readiness and safety features of solid propellant.

The SM-3 Block IB is being developed as part of the Missile Defense
Agency's (MDA) Aegis Ballistic Missile Defense System Phased Adaptive
Approach. The missiles will be deployed on Aegis cruisers and
destroyers, and also on land sites as part of the Aegis Ashore program
to defend against short-to-intermediate range ballistic missile threats
in the mid-course phase of flight. Raytheon is the prime contractor for
the development of SM-3.

"The TDACS provides exceptional control authority for the KW," said
Michael Bright, Aerojet's vice president of Missile Defense and
Strategic Systems. "Each mission builds on the success of the previous
to ensure the full range of capability to meet the evolving threat. The
third consecutive successful operation of our TDACS is increasing our
confidence in the capability of the design, and moving us one step
closer to full production."

Aerojet supports the next generation of sea- and land-based U.S.
missile defense capabilities by providing reliable, low-risk propulsion
technologies. In addition to the current production of MK 72 and MK 104
rocket motors and the SM-3 Block IB TDACS, the company is developing
the TDACS for SM-3 Block IIA, the planned missile variant upgrade to
the current SM-3 Block IA and IB.

Aerojet is a world-recognized aerospace and defense leader principally
serving the missile and space propulsion, defense and armaments
markets. GenCorp is a leading technology-based manufacturer of
aerospace and defense products and systems with a real estate segment
that includes activities related to the entitlement, sale, and leasing
of the company's excess real estate assets. Additional information
about Aerojet and GenCorp can be obtained by visiting the companies'
websites at http://www.Aerojet.com and http://www.GenCorp.com.

The Aerojet logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=12048


CONTACT: Glenn Mahone, Aerojet, 202.302.9941
         Glenn.Mahone@Aerojet.com
         Kristin Conner, Aerojet, 916.355.2143
         Kristin.Conner@Aerojet.com