Munitions

M28A2 Reduced-Range Practice Rocket (RRPR)

Also known as
  • RRPR
  • M28A2
  • LCRRPR
  • Low Cost Reduced Range Practice Rocket
  • MLRS Reduced Range Practice Rocket

The M28A2 Reduced-Range Practice Rocket (RRPR) is a U.S. 227 mm live training rocket for HIMARS and M270-family crews. It uses an inert, unguided payload section and reduced 15 km range for qualification firing while the Army develops JR3 as its FY 2030 replacement path.

M28A2 Reduced-Range Practice Rocket (RRPR), 227 mm reduced-range practice rocket, Munitions
Image source: DVIDS Cobra Gold 2023 HIMARS Live-Fire
Profile / Specs

Profile

Origin
United States
Type
227 mm reduced-range practice rocket
Service note
2000s-origin U.S. training round still used in current HIMARS and MLRS crew training
Designed
2006-2009 development period
Unit cost
FY 2027 Army budget: $12.353K gross unit cost per rocket; $6.785K recurring LCRRPR cost before GFE and support costs
Produced
2010-present
Number built
62,115 prior-year procurement quantity listed in the FY 2027 Army budget, with 3,720 in FY 2025, 4,002 in FY 2026, and 600 requested for FY 2027

Specifications

Caliber
227 mm
Maximum range
15 km
Payload
Inert payload section with blunt nose; Lockheed Martin describes the warhead bay as ballasted with non-explosive material
Guidance
Unguided training rocket; Lockheed Martin says LCRRPR has no sensors or GPS package
Launcher compatibility
M142 HIMARS; M270A1 and M270A2 MLRS crew training requirements
Role
Live training rocket for annual qualification and pre-deployment firing; not a combat munition
Manufacturer context
Produced by Lockheed Martin in Camden, Arkansas and by Letterkenny Munitions Center in Chambersburg, Pennsylvania
Launch Platforms

Army budget material identifies the RRPR as the live training rocket for HIMARS and M270-family launcher crews.

Firing weaponWeapon typeFiring evidence
M142 HIMARS, Wheeled multiple rocket launcher and tactical missile launcher, ArtilleryM142 HIMARSWheeled rocket launcher

The Army budget book says RRPR is the live training rocket for HIMARS launcher units, and DVIDS imagery shows M142 HIMARS firing M28A2 reduced-range practice rockets in Thailand and Estonia.

Sources: MLRS Reduced Range Practice Rockets (RRPR), DVIDS Cobra Gold 2023 HIMARS Live-Fire, 41FAB Estonia 2025 HIMARS M28A2 Photo

M270 MLRS, Tracked multiple launch rocket system, ArtilleryM270 MLRSTracked rocket launcher

The Army budget book says RRPR is the live training rocket for M270 and M270A1 MLRS launcher units, with an inert payload section and blunt nose to reduce range for training use.

Sources: MLRS Reduced Range Practice Rockets (RRPR)

Program Snapshot

Army budget documents treat the RRPR as a current training round while the Joint Reduced Range Rocket is developed as its replacement.

Training role

The Army describes it as the live training rocket for HIMARS and M270A1/M270A2 crews meeting annual qualification and pre-deployment firing requirements.

Production scale

FY 2027 Army procurement records list 62,115 prior-year rockets and a 600-rocket FY 2027 request.

Replacement path

JR3 rapid prototyping continues because LCRRPR motor inventories cannot support production beyond FY 2030.

Timeline

M28A2 Reduced-Range Practice Rocket (RRPR) Key Events

  1. Program development begins

    Army budget history shows the LCRRPR program entering system requirements review in FY 2006, followed by preliminary and critical design reviews in FY 2007 and full development completion in FY 2009.

    Sources: FY 2012 Missile Procurement Army

  2. Letterkenny line validated

    Army reporting says the Precision Fires Rocket and Missile Systems Project Office validated the LCRRPR production line at Letterkenny Munitions Center, which builds rockets for Army and Marine Corps training requirements.

    Sources: Letterkenny Munitions Center supports U.S. Army training rocket requirements

  3. Full-rate production begins

    Army reporting says Letterkenny Munitions Center began full-rate production of the LCRRPR in summer 2018.

    Sources: Letterkenny Munitions Center supports U.S. Army modernization efforts

  4. 500th pod milestone

    Letterkenny produced its 500th LCRRPR pod in November 2018 and shipped the certified pod to a U.S. Army unit for hands-on training.

    Sources: Letterkenny Munitions Center surpasses training rocket production milestone

  5. JR3 replacement funded

    The Army's FY 2027 RDT&E budget continues Joint Reduced Range Rocket rapid prototyping, saying JR3 must begin production by FY 2030 because LCRRPR motor inventories cannot support production beyond that point.

    Sources: FY 2027 Joint Reduced Range Rocket (JR3)

  6. Lithuania HIMARS package includes LCRRPR pods

    A Federal Register notice for Lithuania's HIMARS procurement lists 36 M28A2 low-cost reduced-range practice rocket pods among the requested training and support items.

    Sources: Federal Register Lithuania HIMARS Notice

Media

M28A2 Reduced-Range Practice Rocket (RRPR) Images

M28A2 Reduced-Range Practice Rocket (RRPR), 227 mm reduced-range practice rocket, Munitions - view 1
Source: DVIDS Cobra Gold 2023 HIMARS Live-Fire
Related Weapon Systems
M142 HIMARS, Wheeled multiple rocket launcher and tactical missile launcher, ArtilleryArtilleryM142 HIMARSWheeled multiple rocket launcher and tactical missile launcherThe M142 HIMARS is a U.S.-built wheeled rocket and tactical missile launcher produced by Lockheed Martin for mobile precision fires. It carries one six-rocket pod, two PrSM missiles, or one ATACMS missile, uses a five-ton truck chassis with an armored cab, and can deploy by C-130-class airlift. Lockheed Martin reported the 750th launcher delivery in November 2025, while its combat record spans U.S. operations and Ukrainian long-range fires against Russian forces.
M68 Inert Training Mine, Inert Claymore training mine, MunitionsMunitionsM68 Inert Training MineInert Claymore training mineThe M68 Inert Training Mine is a U.S. Claymore-family practice item built to simulate M18-series Claymore handling without a live explosive mine body. Army portfolio and market-survey material tie the trainer to electric and non-electric DODIC variants, the M33 practice weapon body, an inert mini-detonation assembly, and M7 bandoleer field packing, while AES identifies the M68 as a current inert training product manufactured alongside its M18A1 Claymore work.
USPU-360MC launcher, Self-propelled transporter-erector-launcher for RK-360MC Neptune missiles, Support EquipmentSupport EquipmentUSPU-360MC launcherSelf-propelled transporter-erector-launcher for RK-360MC Neptune missilesThe USPU-360MC is the self-propelled launcher in Ukraine's RK-360MC Neptune coastal missile complex. State Kyiv Design Bureau Luch describes the launcher as the vehicle that stores, transports, prepares, and launches four R-360 missiles; Ukrainian and specialist reporting place it inside a distributed battery with command, reload, transport, ground-support, and Mineral-U target-designation elements.

Sources

Reduced-Range Practice Rocket (RRPR)Publisher: Lockheed Martin | Note: Supports RRPR manufacturer background and the product-page description that it is a training rocket with a 15 km maximum range and a non-explosive ballasted warhead bay. | Accessed: 2026-07-04Lockheed Martin Low Cost Reduced Range GMLRS Rocket ProductionPublisher: Lockheed Martin | Note: Supports LCRRPR background that the training rocket has no live warhead, sensors, or GPS package and cannot be used against real targets. | Accessed: 2026-07-04MLRS Reduced Range Practice Rockets (RRPR)Publisher: U.S. Army | Note: Supports RRPR background, HIMARS and M270A1 launcher compatibility, the inert payload section and blunt nose, and Lockheed Martin / Letterkenny Munitions Center production context. | Accessed: 2026-07-04FY 2012 Missile Procurement ArmyPublisher: U.S. Army | Note: Supports the LCRRPR development schedule, early budgeted production from FY 2010 through FY 2012, and the public budget record for the program's first production years. | Accessed: 2026-07-04Letterkenny Munitions Center supports U.S. Army training rocket requirementsPublisher: U.S. Army | Note: Supports the January 2017 production line validation for the Low Cost Reduced Range Practice Rocket at Letterkenny Munitions Center and its role in Army and Marine training demand. | Accessed: 2026-07-04Letterkenny Munitions Center supports U.S. Army modernization effortsPublisher: U.S. Army | Note: Supports the summer 2018 start of full-rate production for the Low Cost Reduced Range Practice Rocket at Letterkenny Munitions Center. | Accessed: 2026-07-04Letterkenny Munitions Center surpasses training rocket production milestonePublisher: U.S. Army | Note: Supports the November 2018 500th LCRRPR pod milestone and the note that the certified pod was shipped to a U.S. Army unit for hands-on training. | Accessed: 2026-07-04FY 2027 Joint Reduced Range Rocket (JR3)Publisher: U.S. Army | Note: Supports the FY 2027 JR3 replacement-program update, the FY 2030 production-limit context for LCRRPR motor inventories, and the Army's explanation that JR3 will replace the fielded LCRRPR after development and qualification. | Accessed: 2026-07-04FY 2027 Missile Procurement ArmyPublisher: U.S. Army | Note: Supports the FY 2027 RRPR procurement line, the listed Letterkenny recurring cost, gross unit cost, prior-year procurement quantity, and FY 2025-FY 2027 quantities. | Accessed: 2026-07-04Federal Register Lithuania HIMARS NoticePublisher: Federal Register | Note: Supports the Lithuania HIMARS sale context that lists 36 M28A2 low-cost reduced-range practice rocket pods among requested training and support items. | Accessed: 2026-07-04DVIDS Cobra Gold 2023 HIMARS Live-FirePublisher: Defense Visual Information Distribution Service | Note: Supports image provenance for a public-domain photo showing a U.S. Marine Corps HIMARS firing an M28A2 reduced-range practice rocket in Thailand. | Accessed: 2026-07-0441FAB Estonia 2025 HIMARS M28A2 PhotoPublisher: 41st Field Artillery Brigade | Note: Supports image provenance for a public-domain U.S. Army photo showing an M142 HIMARS firing an M28A2 reduced-range practice rocket in Estonia. | Accessed: 2026-07-04