In April 2015, the U.S. State Department approved a possible Foreign Military Sales (FMS) to Pakistan for 15 AH-1Z Vipers with Hellfire missiles, associated equipment and support worth up to $952 million. Pakistan was to receive 9 AH-1Z helicopters by September 2018. As of July 2018, Pakistan's order has been placed on hold, due to political tensions between the U.S. and Pakistan. Of the order of 12 aircraft, nine have been built but are stored at the 309th AMARG base in Arizona, awaiting a solution to the friction between the two countries.