Artillery

MMB17 mortar family

Also known as
  • MMB17
  • MMB17 60 mm
  • MMB17 81/82 mm
  • MMB17 82 mm
  • MMB17 120 mm

The MMB17 mortar family is M Adler D's Croatian in-house mortar line for ground-force indirect fire, covering 60 mm light, 81/82 mm medium, and 120 mm heavy variants. Current official data presents all three with 360-degree traverse and 45-85 degree elevation, with maximum published ranges from 5,000 m for the 60 mm M96-bomb configuration to 9,225 m for the 120 mm rocket-assisted-bomb configuration.

MMB17 mortar family, 60 mm, 81/82 mm, and 120 mm smoothbore mortar family, Artillery
Image source: M Adler D Products Page
Profile / Specs

Profile

Origin
Croatia
Built by
M Adler D
Type
60 mm, 81/82 mm, and 120 mm smoothbore mortar family
Service note
Contemporary
Designer
M Adler D
Produced
Current production

Specifications

Calibers
60 mm, 81/82 mm, and 120 mm
Traverse
360 degrees across listed variants
Elevation
45-85 degrees across listed variants
120 mm ammunition-dependent ranges
6,340 m with light bomb; 5,551 m with heavy bomb; 9,225 m with rocket-assisted bomb; 8,000 m with M95A bomb
81/82 mm range
4,850 m with M74 bomb; 6,225 m with M96 bomb
60 mm range
5,000 m with M96 bomb
Maximum barrel pressure
980 bar for 120 mm; 630 bar for 81/82 mm and 60 mm
Sight scale division
1/64-00 across listed MMB17 variants
Combat weights
177 kg for 120 mm, 42 kg for 81/82 mm, and 34 kg for 60 mm
Associated sight
NSB-4B universal mortar sight listed as compatible with MMB17 60 mm, 81/82 mm, and 120 mm
Associated elevation instrument
KM-1J gunner's quadrant listed for all MMB17 mortar calibers
Design And Sighting Notes

M Adler D presents the MMB17 as a three-caliber mortar family rather than a single tube design. The current official data keeps the same 360-degree traverse and 45-85 degree elevation pattern across the 120 mm, 81/82 mm, and 60 mm variants, while range, pressure, fire rate, and combat weight vary by caliber and ammunition.

Common layout

All listed MMB17 variants use 360-degree traverse, 45-85 degree elevation, and a 1/64-00 sight scale division.

Ammunition effect on range

The 120 mm variant ranges from 5,551 m with a heavy bomb to 9,225 m with a rocket-assisted bomb in official data.

Accessory context

M Adler D lists NSB-4B sight compatibility and KM-1J quadrant application across MMB17 60 mm, 81/82 mm, and 120 mm mortars.

Variants

M Adler D presents MMB17 as a family rather than a single caliber, with official product data separating 120 mm heavy, 81/82 mm medium, and 60 mm light mortar variants.

VariantConfigurationDesignation notes
MMB17 120 mmHeavy mortar variant

Official data lists a 120 mm heavy mortar with 360-degree traverse, 45-85 degree elevation, 15 rounds per minute, 177 kg combat weight, 980 bar maximum barrel pressure, and ammunition-dependent ranges up to 9,225 m with a rocket-assisted bomb.

Sources: M Adler D Product Data

MMB17 81/82 mmMedium mortar variant

Official data lists an 81/82 mm medium mortar with 360-degree traverse, 45-85 degree elevation, 20-25 rounds per minute, 42 kg combat weight, 630 bar maximum barrel pressure, and maximum ranges of 4,850 m with M74 bomb or 6,225 m with M96 bomb.

Sources: M Adler D Product Data

MMB17 60 mmLight mortar variant

Official data lists a 60 mm light mortar with 360-degree traverse, 45-85 degree elevation, 20 rounds per minute, 34 kg combat weight, 630 bar maximum barrel pressure, and 5,000 m range with M96 bomb.

Sources: M Adler D Product Data

Sighting And Elevation Instruments

M Adler D product data ties the mortar family to official sighting and elevation accessories rather than documenting the family as a conflict-used system.

Compatible itemItem typeCompatibility evidence
NSB optical sight, Optical sighting device family for indirect-fire weapons, Support EquipmentNSB optical sightOptical mortar sight

M Adler D lists the NSB-4B universal mortar sight as compatible with MMB17 60 mm, MMB17 81/82 mm, and MMB17 120 mm mortars.

Sources: M Adler D Product Data

KM-1J gunner's quadrant, Indirect-fire elevation measuring instrument, Support EquipmentKM-1J gunner's quadrantElevation measuring instrument

M Adler D lists the KM-1J gunner's quadrant as applicable to all MMB17 calibers among its mortar applications.

Sources: M Adler D Product Data

Ammunition Fired

The official range figures are ammunition-dependent, so these links are class-level caliber relationships rather than model-specific mortar-bomb pages.

AmmunitionAmmunition typeFiring evidence
Mortar bombs, 120mm, Heavy mortar ammunition, MunitionsMortar bombs, 120mm120 mm mortar ammunition

The MMB17 120 mm data gives maximum ranges for light, heavy, rocket-assisted, and M95A 120 mm mortar bombs.

Sources: M Adler D Product Data

Mortar bombs, 81mm, 81 mm mortar bomb, MunitionsMortar bombs, 81mm81 mm mortar ammunition

The MMB17 medium variant is listed as an 81/82 mm mortar, with combined range data for M74 and M96 bombs rather than separate 81 mm and 82 mm bomb models.

Sources: M Adler D Product Data

Mortar bombs, 82 mm, 82 mm high-explosive mortar bomb, MunitionsMortar bombs, 82 mm82 mm mortar ammunition

The MMB17 medium variant is listed as an 81/82 mm mortar, with combined range data for M74 and M96 bombs rather than separate 81 mm and 82 mm bomb models.

Sources: M Adler D Product Data

Mortar bombs, 60mm, 60 mm mortar ammunition, MunitionsMortar bombs, 60mm60 mm mortar ammunition

The MMB17 60 mm data gives a 5,000 m maximum range with M96 mortar-bomb ammunition.

Sources: M Adler D Product Data

Timeline

MMB17 mortar family Key Events

  1. Croatian defence-industry catalogue lists M Adler D mortar production

    The Croatian Defence Industry catalogue listed M Adler D as a Croatian-owned company with a 4,500 square meter production facility and a programme that included 60 mm, 82 mm, and 120 mm mortars.

    Sources: Croatian Defence Industry 2017 PDF

  2. Current M Adler D product data presents the MMB17 family

    M Adler D's current product data separates the MMB17 line into 120 mm heavy, 81/82 mm medium, and 60 mm light mortar variants.

    Sources: M Adler D Product Data

Media

MMB17 mortar family Images

MMB17 mortar family, 60 mm, 81/82 mm, and 120 mm smoothbore mortar family, Artillery - view 1
Source: M Adler D Products Page
MMB17 mortar family, 60 mm, 81/82 mm, and 120 mm smoothbore mortar family, Artillery - view 2
Source: M Adler D Products Page
MMB17 mortar family, 60 mm, 81/82 mm, and 120 mm smoothbore mortar family, Artillery - view 3
Source: M Adler D Products Page
Related Weapon Systems
82 mm M69 mortar, 82 mm smoothbore infantry mortar, ArtilleryArtillery82 mm M69 mortar82 mm smoothbore infantry mortarThe 82 mm M69 is a Yugoslav-designed smoothbore infantry mortar family that remains in Serbian and former Yugoslav production and service channels, with the M69A variant using a four-person crew, NSB-3 sight, and high-angle fire out to roughly 4.9-6.25 km depending on ammunition. Direct open-source documentation links the family to Afghan government losses in 2021, Syrian opposition use near Aleppo, Armenian and Artsakh losses in Nagorno-Karabakh, and Ukrainian wartime receipt of BNT-marked M69A mortars.
120 mm M75 mortar, 120 mm towed smoothbore mortar, ArtilleryArtillery120 mm M75 mortar120 mm towed smoothbore mortarThe 120 mm M75 mortar is a Yugoslav-designed towed smoothbore mortar associated with the M74/M75 light-mortar family and post-Yugoslav export literature. Yugoimport describes it as infantry close-support artillery for high-angle fire, smoke, illumination, and difficult terrain, while Serbian sources and later defense reporting show the legacy weapon being paired with modern fire-control equipment. Direct records place M75 mortars in JNA fire support around Dubrovnik in 1991 and in Armenian/Artsakh losses during the 2020 Nagorno-Karabakh war.
60 mm M57 mortar, 60 mm light infantry mortar, ArtilleryArtillery60 mm M57 mortar60 mm light infantry mortarThe 60 mm M57 is a Yugoslav-pattern smoothbore light infantry mortar now listed by Serbian manufacturer PPT Namenska and in Yugoimport export material. Its official sheets describe a high-angle fire-support weapon built around barrel, base plate, bipod, sight, tools, spares, and accessories; post-Yugoslav records also show Serbian surplus stocks and Balkan export activity. In the 2020 Nagorno-Karabakh Conflict, open-source loss documentation recorded M57 mortars captured from Armenian forces.
81/82 mm mortar, 81/82 mm crew-served medium mortar, ArtilleryArtillery81/82 mm mortar81/82 mm crew-served medium mortarThe 81/82 mm mortar family covers the modern crew-served, muzzle-loaded, smoothbore indirect-fire class descended from the Stokes mortar lineage and still fielded worldwide in variant-specific forms. This is a family-level page: 81 mm L16/M252/M252A1/F2-type systems and 82 mm Soviet/Russian-pattern systems such as 2B14 and 2B24 share a medium-mortar battlefield role but are not interchangeable hardware. Conflict rows stay at the caliber or named-system level supported by the source, including Boko Haram/ISWAP recovered 81 mm equipment, Iraqi M252 training under Operation Inherent Resolve, U.S. Marine M252 use and Afghan Border Police 82 mm sustainment in Afghanistan, PKK 81/82 mm mortar use where no single model is identified, and Chadian 82 mm mortar training before operations in Mali.

Sources

M Adler D HomepagePublisher: M Adler D | Note: Supports Croatian manufacturer context, in-house weapons-program positioning, and product-area context. | Accessed: 2026-07-13M Adler D Products PagePublisher: M Adler D | Note: Supports the current product-range context for M Adler D mortar systems and official product imagery. | Accessed: 2026-07-13M Adler D Company PagePublisher: M Adler D | Note: Supports Croatian ownership, production-facility scale, and company background for the manufacturer. | Accessed: 2026-07-13M Adler D Capabilities PagePublisher: M Adler D | Note: Supports in-house design and production capability for mortars and fire-control instruments, MMB17 variants in the production programme, and the 980 bar 120 mm mortar pressure figure. | Accessed: 2026-07-13M Adler D Product DataPublisher: M Adler D | Note: Supports MMB17 120 mm, 81/82 mm, and 60 mm variant names, specifications, ranges, weights, official image paths, NSB-4B sight compatibility, and KM-1J application. | Accessed: 2026-07-13Croatian Defence Industry 2017 PDFPublisher: Croatian Ministry of Defence | Note: Supports 2017 Croatian defence-industry context for M Adler D, including Croatian ownership, production-facility scale, and a programme listing 60 mm, 82 mm, and 120 mm mortars. | Accessed: 2026-07-13