The US Air Force (USAF) has awarded a $413.8m contract to Lockheed Martin for the production of the joint air-to-surface standoff missile (JASSM) extended range (ER) version.
The company will supply 360 JASSM-ER missiles, data, tooling and test equipment.
The supply of these missiles will bring the total number of JASSM-ER missiles under contract to 910 and to more than 3,000 missiles for JASSM and JASSM-ER combined.
Lockheed Martin Missiles and Fire Control long range strike systems programme director Jason Denney said: "We have focused our efforts on enhancing the capabilities of this formidable and highly reliable missile for US and allied warfighters.
"Lot 15 and future production lots will benefit from the enhancements and the many affordability initiatives we are executing."
Both JASSM and JASSM-ER are armed with a penetrating blast-fragmentation warhead and can be used in any weather condition to destroy fixed and relocatable targets.
JASSM is integrated on multiple aircraft, including B-1B, B-2, B-52, F-16, F-15E, F/A-18A/B, and F-18C/D aircraft. The B-1B carries JASSM-ER.
The JASSM-ER is said to have more than two-and-a-half times the range of JASSM for greater standoff range.
These 2,000lb cruise missiles are also equipped with an infrared seeker and improved digital anti-jam GPS receiver to dial into specific points on targets.
More than 2,150 JASSMs, which are produced at the company's manufacturing facility in Troy, Alabama, US, have been delivered so far.