U.S. Army Demonstrates New XM1113, M982 Excalibur Munitions from Prototype ERCA Self-Propelled Howitzer

The U.S. Army demonstrated the new XM1113 and M982 Excalibur munitions, discharged from a prototype Extended Range Cannon Artillery (ERCA) self-propelled howitzer, earlier this year.

During the evaluation process, the XM1113 Insensitive Munition High Explosive Rocket Assisted Projectile, or XM1113 RAP, exceeded the previous maximum ranges. Similarly, the improved Excalibur M982 munition exhibited an increase in range beyond 40 km.

XM1113 RAP

The XM1113 RAP is a new projectile which is slated to replace the U.S. Army’s aging M549A1 High-Explosive Rocket-Assisted (HERA) 155 mm howitzer rounds, which can reach about 30 km.

The XM1113 RAP uses rocket technology to deliver greater thrust to the round when compared to its predecessor. This will enable current U.S. Field Artillery 155mm Systems to fire the XM1113 RAP to a range of 40 kilometers, a 30% increase from the M549A1.

When fired from the planned Extended Range Artillery Cannon (ERCA), the XM1113 will achieve ranges out to 70 kilometers. The round aligns with the U.S. Army’s modernization initiative under the Long Range Precision Fires (LRPF) Cross-Functional Team.

The XM113 program is a joint development between the Armament Research, Development and Engineering Center (ARDEC) and the Program Executive Office Ammunition, both located at Picatinny Arsenal. The Program Executive Ammunition is the Single Manager for Conventional Ammunition that manages the complete lifecycle of all ammunition from “cradle to grave.”

The XM1113 RAP is currently planned for Limited Rate Initial Production in Fiscal Year 2022.

155mm XM1113 Rocket-Assisted Projectile (RAP)
Rendering of the 155mm XM1113 Rocket-Assisted Projectile (RAP) round being developed by General Dynamics Ordnance and Tactical Systems (GD-OTS) for the U.S. Army. GD-OTS Photo.

M982 Excalibur

The Excalibur (XM982, M982 and M982A1) is a 155 mm, Global Positioning System (GPS)-guided, extended-range artillery projectile in use as the U.S. Army’s next-generation cannon artillery precision munition.

The Excalibur projectile uses a jam-resistant internal GPS receiver to update the inertial navigation system, providing precision in-flight guidance and dramatically improving accuracy to less than two meters miss distance regardless of range.

The projectile has three fuze options (point-detonation, point-detonation delay and height-of-burst) and is employable in all weather conditions and terrains. The Excalibur’s capabilities allow for first-round effects-on-target while simultaneously minimizing collateral damage and the number of rounds required to engage targets.

M982 Excalibur
M982 Excalibur 155mm Precision Guided Extended Range Artillery Projectile.

Extended Range Cannon Artillery (ERCA)

The U.S. Army’s Extended Range Cannon Artillery (ERCA) program is investigating and developing technology to extend the range of the Army’s 155mm self-propelled howitzer.



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