Aerojet Propulsion Systems Support Successful SM-3 Intercept Test

Aerojet Propulsion Systems Support Successful SM-3 Intercept Test

SACRAMENTO, Calif., Feb. 13, 2013 (GLOBE NEWSWIRE) -- Aerojet, a GenCorp
(NYSE:GY) company, announced that its propulsion systems supported today's
successful intercept test of Raytheon's Standard Missile-3 (SM-3) Block IA
guided missile off the coast of Hawaii.

During the intercept test, Aerojet's MK 72 booster and MK 104 dual-thrust
rocket motor provided first- and second-stage propulsion for the SM-3 Block IA
guided missile. The test was conducted at the Pacific Missile Range Facility
in Kauai.

The successful intercept advances U.S. missile defense capabilities and
highlights Aerojet's leading role in providing reliable, affordable propulsion
technologies. "Aerojet's propulsion systems have performed successfully on
every SM-3 flight and intercept test to date," said Aerojet's Vice President
of Tactical Programs John Myers. "This test further demonstrates the
reliability of our tactical missile product line."

The SM-3, capable of being based on land or at sea, is a key component of the
President's Phased Adaptive Approach, which focuses on protecting the U.S.
homeland from first generation Intercontinental Ballistic Missiles (ICBMs) as
well as U.S. assets and allies in Europe from regional threats.

Aerojet is a world-recognized aerospace and defense leader providing
propulsion and energetics to the space, missile defense, strategic, tactical
missile and armaments areas in support of domestic and international 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

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