Work will occur in Poway, Calif. and the Pentagon expects work to finish on Dec. 1, 2013.
Wright Patterson Air Force Base in Ohio is the contracting activity for the cost-plus-incentive-fee contract.
The company is also helping the Navy and BAE Systems develop a long-range railgun for surface ships.
The companies are contracted to provide a concept design for a thermally managed launcher system.
The Navy wants the guns to hit targets within 50 to 100 nautical miles and launch a projectile with 32 megajoule of energy at 5,600 miles per hour.