The US Army has awarded a $40m contract to Aerojet to deliver Hawk rocket motors to the US Army Aviation and Missile Command (AMCOM) for sale to allied countries.

The HAWK is a surface-to-air guided, medium-range missile that provides air defence coverage against low-to-medium-altitude aircraft.

The system is currently in use by 20 allied countries around the world.

Aerojet has manufactured about 44,000 HAWK rocket motors for the US Army and its allies.

Deliveries to AMCOM are scheduled to begin in 2010.