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The XM1156 Precision Guidance Kit is a U.S. Army program to develop a precision guidance system for existing 155 mm artillery shells.[1] The prime contractor is Alliant Techsystems and the industry team includes Interstate Electronics Corporation.[2]


In operation the PGK will screw into the nose of the projectile much like the existing fuze. However as well as the fuzing function it will provide a GPS guidance package and control surfaces to correct the flight of the shell. This is analogous to the addition of a Joint Direct Attack Munition (JDAM) tail-kit to a dumb iron bomb, creating a precision guided munition. If the shell does not land within 150 meters of its target, it deactivates itself and does not explode.[3] The system began production in 2009, and was expected to be in service by 2010.[4] Fielding is now expected to begin in spring 2013.[5]


On 8 August 2013, Australia requested the sale of 4,002 M1156 Precision Guidance Kits with training and associated equipment for $54 million.[6]


Diagram of XM1156 alongside standard fuse profile

Program status

  • June 2006: Raytheon downselected from XM1156 competition.
  • July 2006: BAE Systems and Alliant Techsystems selected to take part in a competitive Technical Development (TD) program.
  • May 2007: System Demonstration and Development (SDD) contract awarded to Alliant Techsystems.[9]
  • October 2012: Soldiers from Fort Bliss became the first troops to fire the XM1156 guidance kit. 24 PGK-equipped projectiles were fired.[5]

See also


External links

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