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Why US Army artillery needs a new Precision Guidance Kit

14th July 2023 - 14:30 GMT | by Christopher F Foss in London

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A new Precision Guidance Kit is being developed for use with the ERCA self-propelled howitzer system. (Photo: US Army)

Northrop Grumman has secured a $40.6 million US Army contract for M1156E4 Precision Guidance Kit development, expanding capabilities for new artillery systems. Learn more about this major upgrade.

Northrop Grumman Defense Systems has been awarded a US Army contract valued at $40,600,169 for development, qualification and production of the M1156E4 Precision Guidance Kit (PGK).

Current production versions of the M1156 are optimised for 155mm/39cal artillery systems including the M777 Light Towed Howitzer (LTH) and M109A6/A7 Paladin self-propelled howitzer (SPH).

The M1156E4 is essentially an Engineering Change which will allow for projectiles fitted with the PGK to be fired from the new Watervliet 155mm/58cal Extended Range Cannon Artillery (ERCA) which will be fitted to the M109 series under a major upgrade.

ERCA has a larger chamber volume and fires

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Christopher F Foss

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Christopher F Foss


Christopher F Foss is an internationally recognised authority on armoured fighting vehicles, artillery and other weapon systems, …

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