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M777A2 (LW155) 155mm Howitzer

Deployable, mobile, lethal, and survivable


General Information

  • Joint, ACAT II, USMC/Army Program
  • Direct support, general support, reinforcing, or general support reinforcing artillery system replacing the M198 155mm Medium Towed Howitzer
  • Fielded with an integrated Digital Fire Control System (DFCS) that enables the M777A2 to emplace and displace faster and fire more accurately
  • Compatible with fielded and projected U.S. 155mm munitions, Excalibur, Family of Medium Tactical Vehicles (FMTV), Medium Tactical Vehicle Replacement (MTVR), and 5-ton trucks

Strategically Transported

  • Towed by the USMC MTVR and Army FMTV and M939 Series trucks
  • Loaded and secured aboard C-141 aircraft or naval amphibious shipping and landing such as LCM-8
  • Two M777A2 Howitzers are transportable in a single C-130 aircraft
  • Externally slung below medium lift helicopters to include CH-47D, CH-53D, CH-53E and the MV-22


  • Weight: <10,000 lbs
  • Maximum Elevation: +1275 mils
  • Minimum Elevation: -43 mils
  • Traversing Range: 800 mils, (400 mils left and 400 mils right of center)
  • Rates of Fire:
    • Maximum: 4 rounds per minute for 2 minutes
    • Sustained: 2 rounds per minute
  • Maximum Safe Towing Speeds:
    • 45 MPH on Improved Roads
    • 35 MPH on Secondary Roads
    • 15 MPH Cross Country

FMS/International Partners

  • Australia
  • Canada
  • India


  • M777 – base howitzer with Optical Fire Control sighting system
  • M777A1 – Digital Fire Control upgrades with the addition of an on-board computer, power source, satellite Global Positioning System, inertial navigation, radio, Gunner’s Display and Chief of Section Display (CSD)
  • M777A2 – Block 1A software upgrade. Addition of an Enhanced Portable Inductive Artillery Fuze Setter (EPIAFS) to enable Excalibur and precision munition compatibility
  • M777ER - Experimental upgrade created by the Extended Range Cannon Artillery (ERCA) project (concept only)

 Additional Resources

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Additional Resources

Technical Support

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