Orbital ATK has been contracted by Lockheed Martin to provide support for the US Army's guided multiple launch rocket system (GMLRS).
The deal is part of a $227m GMLRS rocket production contract, awarded to Lockheed Martin by the army last year.
Under the $14m contract, the company will supply alternative warhead (AW) with lethality enhanced ordnance (LEO) technology for the GMLRS system.
Orbital ATK missile products division vice-president and general manager Pat Nolan said: "This type of warhead represents a significant capability for the army.
"We are very excited to be part of the Lockheed Martin GMLRS programme fielding this technology and its many applications within the military."
The contract was awarded after several developmental and operational flight tests, during which GMLRS AW was found to be compliant with army requirements.
The original contract also covered a US Government foreign military sale of GMLRS Unitary rockets to Bahrain and the UAE.
The alternative warhead has been designed to achieve area-effects requirement similar to the old MLRS submunition warheads, and can engage targets while eliminating unexploded ordnance.
To date, more than 25,000 GMLRS rockets have been produced by Lockheed Martin at its Camden facility.
Packaged in an MLRS launch pod, the all-weather GMLRS rocket is fired from the Lockheed HIMARS or M270 family of launchers during combat operations.
The rocket is also used by the armed forces of France, Germany, Italy, the UK, Japan, Jordan, Singapore, Bahrain and the UAE.
Last week, Orbital won a $47m contract from the US Air Force to develop a solid rocket propulsion system prototype for the Evolved Expendable Launch Vehicle (EELV) programme.