The aircraft will be equipped with EO/IR (Electro-Optical Infra-Red) cameras, radar and communications systems, Piaggio said in a statement, adding that the contract also covers logistic support and training.
The contract has been signed with Abu Dhabi Autonomous Systems Investments (ADASI).
Italy-based Piaggio is controlled by Mubadala, an Abu Dhabi-based strategic investment firm.
Last year Piaggio said the Italian Air Force, which has been closely involved in the development of the UAV, would be the launch-customer of the Hammerhead, with deliveries to start this year.
The Hammerhead is an unmanned version of Piaggio's P.180 business jet.