design so much it was re-designated the M1299. One battalion of vehicles is planned to begin a year-long operational assessment in 2023. The autoloader is planned to be ready in 2025. Derivatives M992 The M992 Field Artillery Ammunition Support Vehicle (FAASV) is built on the chassis of the M109. It replaced the M548. Unlike the M548, it is armored. This ammunition vehicle has no turret, but has a taller superstructure to store 93 rounds and an equivalent number of powders and primers. This vehicle is fitted with a Halon fire suppression system and a weapons mount similar to that on the M109 turret, usually mounting a Mk 19 grenade launcher for local defense against infantry and light armored vehicles. The vehicle contains a 2-stroke diesel powered auxiliary power unit that can power all non-automotive energy requirements on the FAASV and on the M109. K66 The K66 was a planned ammunition support vehicle for the K55. As a follow-up to the K55 program, Samsung Aerospace Industries prepared for licensing a local variant of the M992, featuring such modifications as NBC protection and an increase of ammunition storage capacity to 110 rounds, 116 packs of powders, and 132 primers. In 1987, Samsung Aerospace Industries competed against the Daewoo Heavy Industries' ammunition support vehicle based on the K200 APC. Daewoo Heavy Industries' vehicle was selected as the K66, but failed the test evaluation. The K66 project was cancelled in the mid-1990s, resulting in a lawsuit. K77 FDCV (Fire Direction Center Vehicle) The K77 FDCV is a command & control post vehicle variant based on the K55 platform. K56 ARV (Ammunition Resupply Vehicle) The K56 ARV is an ammunition resupply vehicle based on the K55 platform. Unlike the K10 ARV, the K56 can resupply both the K55A1 and the K9 Thunder. It has a 45.7% (4,197 out of 9,191 total parts) compatibility with the K55A1. After 10 months of pilot experiment, the K56 program was authorized by the DAPPC (Defense Acquisition Program Promotion Committee) in February 2007. In May 2007, the DAPPC allocated 16 billion KRW for research and development for 2008 to 2010, with plans to produce 520 vehicles between 2011 and 2020. In June 2008, Samsung Techwin was selected as the main contractor for the project. Later, the development completion schedule was delayed to 2011, while the total production amount was increased to 700 vehicles with a cost of 1.3 trillion KRW