High Quality Content by WIKIPEDIA articles! The XM1156 Precision Guidance Kit is a U.S. Army program to develop a precision guidance system for existing 155 mm artillery shells. The prime contractor is Alliant Techsystems, leading a team including Rockwell Collins and Draper Labs. 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. The system is currently expected to begin production in 2009, and to be in-service by 2010.

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