Munitions

M751/M775/M781 mortar practice fuzes

Also known as
  • M751 point detonating practice fuze
  • M775 point detonating practice fuze
  • M781 point detonating practice fuze
  • M751/M775/M781 point detonating practice fuzes
  • M751 M775 M781 PD practice fuzes
  • M751/M775/M781 mortar practice fuzes

The M751, M775, and M781 are U.S. point-detonating practice fuzes used with mortar training cartridges rather than combat high-explosive rounds. Army and DLA sources tie the M751 to the M879 81 mm FRPC, the M775 to the M769 60 mm FRPC and M880 81 mm SRPC, and the M781 to the M931 120 mm FRPC, while Defense Department contract announcements identify Nammo Pocal as a manufacturer for the fuze family.

M751/M775/M781 mortar practice fuzes, Point-detonating mortar practice fuze family, Munitions
Image source: M769 mortar range image
Profile / Specs

Profile

Origin
United States
Built by
Nammo-Pocal
Type
Point-detonating mortar practice fuze family
Service note
Contemporary U.S. mortar training ammunition components
Produced
U.S. Army production contracts documented in 2017 and 2024

Specifications

Fuze type
Single-safe point-detonating practice fuzes
M751 compatible cartridge
M879 81 mm full range practice cartridge
M775 compatible cartridges
M769 60 mm full range practice cartridge and M880 81 mm short range practice cartridge
M781 compatible cartridge
M931 120 mm full range practice cartridge
Training signature
Flash, bang, and smoke effect on impact for mortar-fire adjustment training
Pyrotechnic charge
M751 and M781 listed at 16 grams; M775 listed at 12 to 12.5 grams across public Army contracting summaries
FSC
1390 fuzes and primers
Compatible Practice Cartridges

Public Army and DLA sources identify these fuzes through their use on mortar practice cartridges rather than as independent combat munitions.

Compatible itemItem typeCompatibility evidence
M879 81 mm full-range practice cartridge, 81 mm full-range mortar practice cartridge, MunitionsM879 81 mm full-range practice cartridge81 mm full range practice cartridge using M751

Army portfolio and contracting material identify the M879 81 mm full range practice cartridge as the cartridge that uses the M751 point-detonating practice fuze.

Sources: PEO Ammunition 2017 Portfolio Book, M751 M775 M781 Point Detonating Practice Fuzes 2023

M769 60 mm full range practice cartridge, 60 mm full range practice cartridge, MunitionsM769 60 mm full range practice cartridge60 mm full range practice cartridge using M775

DLA ASSIST lists the M775 point-detonating practice fuze for the M769 60 mm full range practice cartridge, and the M769 catalog record covers the linked cartridge.

Sources: Fuze, Point Detonating: Practice - M775

M880 81 mm short-range practice cartridge, 81 mm short-range mortar practice cartridge, MunitionsM880 81 mm short-range practice cartridge81 mm short range practice cartridge using M775

DLA ASSIST identifies the M775 point-detonating practice fuze as used on the M880 81 mm short range practice cartridge.

Sources: Fuze, Point Detonating: Practice - M775

M931 Full Range Practice Cartridge, 120 mm full-range practice mortar cartridge, MunitionsM931 Full Range Practice Cartridge120 mm full range practice cartridge using M781

Army portfolio material describes the M931 as equipped with the M781 point-detonating practice fuze for flash, bang, and smoke feedback.

Sources: PEO Ammunition 2017 Portfolio Book

Training Fuze Context

The M751/M775/M781 grouping is treated as a relationship-only component page because public sources describe mortar practice fuzes and their training-cartridge applications, not direct conflict use.

FuzePractice cartridgeSource-backed role
M751M879 81 mm full-range practice cartridge, 81 mm full-range mortar practice cartridge, MunitionsM879 81 mm FRPCArmy sources describe a single-safe PD practice fuze with flash, bang, and smoke output for 81 mm full-range training.
M775M769 60 mm full range practice cartridge, 60 mm full range practice cartridge, MunitionsM769 60 mm FRPC; M880 81 mm short-range practice cartridge, 81 mm short-range mortar practice cartridge, MunitionsM880 81 mm SRPCDLA ASSIST identifies the active M775 specification and names the M769 and M880 practice cartridges.
M781M931 Full Range Practice Cartridge, 120 mm full-range practice mortar cartridge, MunitionsM931 120 mm FRPCArmy portfolio material says the M931 uses the M781 PD practice fuze for flash, bang, and smoke feedback.

Sources: M751 M775 M781 Point Detonating Practice Fuzes 2023; Fuze, Point Detonating: Practice - M775; PEO Ammunition 2017 Portfolio Book.

Timeline

M751/M775/M781 mortar practice fuzes Key Events

  1. Army surveys practice-fuze sources

    Army Contracting Command market-survey material described the M751, M775, and M781 point-detonating practice fuzes and estimated a requirement for about 940,000 fuzes.

    Sources: M751 M775 M781 Point Detonating Practice Fuzes

  2. Nammo Pocal contract announced

    The Defense Department announced a Nammo Pocal contract to manufacture, test, package, and deliver M751/M775/M781 point-detonating practice fuzes.

    Sources: Contracts For Dec. 21, 2017

  3. Follow-on fuze contract announced

    The Defense Department announced a $74.7 million Nammo Pocal contract for point-detonating mortar practice fuzes, with an estimated completion date in July 2029.

    Sources: Contracts For Jul. 1, 2024

  4. M775 specification validated

    DLA ASSIST lists the M775 practice-fuze specification as active with a 15 August 2024 validation notice and a next review due in August 2029.

    Sources: Fuze, Point Detonating: Practice - M775

Related Weapon Systems
M888 60 mm high explosive cartridge, 60 mm high-explosive mortar cartridge, MunitionsMunitionsM888 60 mm high explosive cartridge60 mm high-explosive mortar cartridgeThe M888 is a U.S. 60 mm high-explosive mortar cartridge for the M224/M224A1 Lightweight Company Mortar System. Army and environmental ordnance references identify it as DODIC B643 with an M935 point-detonating fuze, Composition B fill, 67- to 3,490-meter range, and fragmentation/blast effects against personnel and light materiel. Public conflict-specific evidence for this cartridge currently comes from Afghan National Army and Iraq Train and Equip Fund supply records, so the conflict rows document transfer and delivery context rather than confirmed battlefield firing.
M721 60 mm visible light illumination cartridge, 60 mm visible-light illuminating mortar cartridge, MunitionsMunitionsM721 60 mm visible light illumination cartridge60 mm visible-light illuminating mortar cartridgeThe M721 is a U.S. 60 mm visible-light illuminating mortar cartridge for the M224/M224A1 lightweight company mortar system. Army ammunition materials describe a parachute-and-candle payload, an M776 mechanical time fuze, and roughly 300,000 candlepower for observation, fire adjustment, and signaling, while transfer and budget records place the round in Afghan and Iraqi partner-force ammunition channels.
Mortar bombs, 81mm, 81 mm mortar bomb, MunitionsMunitionsMortar bombs, 81mm81 mm mortar bomb81 mm mortar bombs are fin-stabilized ammunition families made by many arsenals and defense manufacturers for medium mortars, with high-explosive, smoke, illumination, infrared-illumination, and training variants. Documented conflict use in this catalog includes Boko Haram improvised explosive devices made from captured mortar bombs, U.S. transfers of 81 mm mortar rounds to Ukraine, and Myanmar Civil War reporting of both SAC mortar fire and resistance drone drops.

Sources

Contracts For Dec. 21, 2017Publisher: U.S. Department of Defense | Note: Supports the Nammo Pocal contract award for manufacturing, testing, packaging, and delivery of M751/M775/M781 point-detonating practice fuzes. | Accessed: 2026-07-13M751 M775 M781 Point Detonating Practice FuzesPublisher: GovTribe | Note: Mirrors an Army Contracting Command market survey describing the M751, M775, and M781 practice fuzes, associated mortar practice cartridges, pyrotechnic charges, estimated quantity, and production-rate planning context. | Accessed: 2026-07-13M751 M775 M781 Point Detonating Practice Fuzes 2023Publisher: GovTribe | Note: Mirrors a SAM.gov solicitation summary for M751, M775, and M781 point-detonating mortar practice fuzes, including U.S. Army and Marine Corps LAP context, cartridge compatibility, pyrotechnic smoke-charge figures, industrial-mobilization competition limits, and planned IDIQ procurement structure. | Accessed: 2026-07-13Fuze, Point Detonating: Practice - M775Publisher: Defense Logistics Agency ASSIST QuickSearch | Note: Supports the M775 point-detonating practice-fuze designation, active specification status, FSC 1390 classification, and use on M880 81 mm SRPC and M769 60 mm FRPC cartridges. | Accessed: 2026-07-13PEO Ammunition 2017 Portfolio BookPublisher: U.S. Army Capability Program Executive Office Ammunition & Energetics | Note: Supports the M751 role on M879 and the M781 role on M931, including flash, bang, and smoke training effects for mortar-practice cartridges. | Accessed: 2026-07-13Contracts For Jul. 1, 2024Publisher: U.S. Department of War | Note: Supports the 2024 Nammo Pocal contract for point-detonating mortar practice fuzes and the July 2029 estimated completion date. | Accessed: 2026-07-13M769 mortar range imagePublisher: Wikimedia Commons | Note: Image provenance for a public-domain Marine Corps photograph showing an M769 round during M224 mortar training; used as related practice-cartridge imagery for the M775-compatible cartridge. | Accessed: 2026-07-13