Artillery

Ground Deployed Advanced Mortar System (GDAMS)

Also known as
  • GDAMS
  • 120 mm GDAMS
  • 120mm GDAMS
  • 120 mm Ground Deployed Advanced Mortar System
  • 120mm Ground Deployed Advanced Mortar System
  • Ground Deployed Advanced Mortar System

GDAMS is ST Engineering's lightweight Ground Deployed Advanced Mortar System for wheeled military platforms. Official material describes an 81 mm or 120 mm compatible, vehicle-agnostic mortar with digital mission assignment, automatic laying from target coordinates, a patented blast diffuser, 15-second deployment and stowage, and compatibility with precision-guided 120 mm mortar bombs.

Ground Deployed Advanced Mortar System (GDAMS), Vehicle-mounted 81 mm and 120 mm advanced mortar system, Artillery
Image source: Ground Deployed Advanced Mortar System (GDAMS)
Profile / Specs

Profile

Origin
Singapore
Type
Vehicle-mounted 81 mm and 120 mm advanced mortar system
Service note
2020s-present
Designer
ST Engineering Land Systems
Designed
Publicly marketed by 2024
Produced
2020s-present

Specifications

Caliber
81 mm and 120 mm smoothbore
Crew
2 to 3
Deployment and stowage
15 seconds / 15 seconds
Maximum range
9 km, ammunition dependent
Traverse
+/-90 degrees
Traverse speed
>5 degrees per second
Elevation
45 to 80 degrees
Elevation speed
>5 degrees per second
Elevation/traverse accuracy
<3.0 mils
Maximum rate of fire
15 rounds per minute for 3 minutes
Sustained rate of fire
4 rounds per minute for 20 minutes
Mode of fire
Drop fire
Fire-control
Digital mission assignment, automatic laying from target coordinates
Blast diffuser
Patented diffuser described as reducing noise exposure by threefold
Recoilless integration
Firing forces directed into the ground for integration on light wheeled vehicles
Compatible Ammunition

ST Engineering's GDAMS brochure says the system supports 81 mm and 120 mm qualified ammunition, including precision-guided rounds and the Precision Guided 120 mm Mortar Bomb.

AmmunitionAmmunition typeFiring evidence
PM120 precision guided mortar bomb, 120 mm GPS-guided precision mortar bomb, MunitionsPM120 precision guided mortar bomb120 mm GPS-guided precision mortar bomb

The GDAMS brochure states compatibility with the Precision Guided 120 mm Mortar Bomb, and DefenceWeb reported a TAC-6/GDAMS demonstration of ST Engineering's PM120 GPS-guided round.

Sources: GDAMS brochure, Armormax Defence and ST Engineering demo mortar-mounted TAC-6 vehicle

Extended Range High Explosive, 120 mm high-explosive mortar round for smoothbore mortar systems, MunitionsExtended Range High Explosive120 mm high-explosive mortar round

The GDAMS brochure lists 120 mm qualified ammunition compatibility, while Janes identifies Extended Range High Explosive as part of ST Engineering's SRAMS Mk II 120 mm ammunition suite.

Sources: GDAMS brochure, IDEX 2018: Singapore's ST Engineering launches SRAMS 120 mm Mk II

120 mm ER Infra-Red Red Phosphorous, 120 mm extended-range smoke mortar round, Munitions120 mm ER Infra-Red Red Phosphorous120 mm infrared smoke mortar round

The GDAMS brochure lists 120 mm qualified ammunition compatibility, and ST Engineering's mortar-bombs page describes its 120 mm extended-range mortar bombs as compatible with smooth-bore mortar systems.

Sources: GDAMS brochure, Mortar Bombs

Component Scope

Public sources currently describe GDAMS through product data, partner integration proposals, qualification trials, and live demonstrations rather than direct use in a named armed conflict.

Launcher role

ST Engineering describes GDAMS as a lightweight 81 mm/120 mm mortar system for wheeled military platforms, with automatic laying from target coordinates and rapid deploy/stow cycles.

Vehicle integration

Official and specialist reporting place GDAMS on light wheeled platforms including Toyota, Supacat, TAC-6, and Roshel concepts; these are demonstration or marketing integrations unless a fielded customer is separately sourced.

Ammunition compatibility

The official brochure lists 81 mm and 120 mm qualified ammunition, including precision-guided rounds and the Precision Guided 120 mm Mortar Bomb.

Source limit

The record remains relationship-only because available public sources do not directly document GDAMS use, transfer, delivery, or fielding in a named armed conflict.

Sources: Ground Deployed Advanced Mortar System (GDAMS); GDAMS brochure; Ground Deployed Advanced Mortar System - Babcock International Group; ST Engineering promotes GDAMS mortar to foreign markets; IDEX 2025 - ST Engineering GDAMS ready for qualification trials; Armormax Defence and ST Engineering demo mortar-mounted TAC-6 vehicle; Canada's Roshel develops mobile mortar system.

Timeline

Ground Deployed Advanced Mortar System (GDAMS) Key Events

  1. GDAMS unveiled at DSEI

    Asian Military Review and EDR reported GDAMS as a DSEI 2023 unveiling that ST Engineering continued to develop through subsequent firing trials and platform integrations.

    Sources: ST Engineering promotes GDAMS mortar to foreign markets, IDEX 2025 - ST Engineering GDAMS ready for qualification trials

  2. GDAMS marketed as a lightweight vehicle-mounted mortar

    ST Engineering product material described GDAMS as a lightweight, vehicle-agnostic mortar system with 81 mm and 120 mm compatibility, digital fire control, and rapid deployment.

    Sources: GDAMS brochure

  3. Babcock and ST Engineering unveil UK production proposal

    DefenceMirror reported Babcock and ST Engineering's DVD 2024 presentation of 120 mm GDAMS for the UK, including a Devonport production proposal and vehicle-mounted configuration.

    Sources: Babcock, ST Engineering Unveil 120mm Mortar System at DVD 2024

  4. Regional marketing and platform integration reported at IDEX

    Shephard reported ST Engineering working with International Golden Group to market GDAMS in the region and described earlier Toyota Land Cruiser and Supacat integrations.

    Sources: IDEX 2025: Could ST Engineering's 120mm mortar be in the frame for UAE service?

  5. Qualification and prospective-customer trials described

    Asian Military Review reported that ST Engineering expected GDAMS qualification testing to complete in 2025 and that vehicle-agnostic trials had occurred in South Africa, Thailand, and the UK.

    Sources: ST Engineering promotes GDAMS mortar to foreign markets

  6. GDAMS shown inside ST Engineering light reconnaissance concept

    ST Engineering announced GDAMS as part of its DSEI 2025 Light Reconnaissance Strike concept, with the system integrated into an EAK-backed sensor-to-shooter architecture and displayed on three partner platforms.

    Sources: ST Engineering Showcases Defence Innovations and Expands Global Partnerships at DSEI 2025

  7. TAC-6/GDAMS demonstration in South Africa

    DefenceWeb reported that Armormax Defence and ST Engineering demonstrated a TAC-6 vehicle fitted with GDAMS at Armscor's Alkantpan range, including PM120 GPS-guided ammunition context.

    Sources: Armormax Defence and ST Engineering demo mortar-mounted TAC-6 vehicle

  8. Roshel Senator Pickup concept shown at CANSEC

    Defence Blog reported that Roshel presented a Senator Pickup integrated with GDAMS at CANSEC 2026 in Ottawa as a mobile mortar concept.

    Sources: Canada's Roshel develops mobile mortar system

Media

Ground Deployed Advanced Mortar System (GDAMS) Videos

Ground Deployed Advanced Mortar System (GDAMS) Images

Ground Deployed Advanced Mortar System (GDAMS), Vehicle-mounted 81 mm and 120 mm advanced mortar system, Artillery - view 1
Source: Ground Deployed Advanced Mortar System (GDAMS)
Related Weapon Systems
Scorpion 120 mm mortar system, vehicle-mounted 81 mm / 120 mm mobile mortar system, ArtilleryArtilleryScorpion 120 mm mortar systemvehicle-mounted 81 mm / 120 mm mobile mortar systemThe Scorpion 120 mm mortar system is the U.S.-marketed name for Milanion NTGS's Alakran vehicle-mounted mortar family, combining an 81 mm or 120 mm mortar, automated laying, digital fire control, and ground-transmitted recoil management. Ukrainian and defense-industry reporting documented Alakran/Scorpion use in 2023-2024, including Kharkiv-region combat and later 210th Assault Regiment training with Spain-supplied VAMTAC-mounted systems.
M224, 60 mm lightweight company mortar, ArtilleryArtilleryM22460 mm lightweight company mortarThe M224 is a U.S. 60 mm lightweight company mortar built for infantry close-support fires from either a conventional bipod/baseplate setup or a lighter handheld mode. Its 70- to 3,490-meter conventional-mode range, high-angle fire, and mix of high-explosive, smoke, illumination, and training cartridges make it useful for small-unit suppression, screening, marking, and illumination; documented uses include Ukrainian front-line employment, U.S. coalition advise-and-assist fires during 2014 Operation Inherent Resolve, and U.S. Army field use in Afghanistan.

Sources

Ground Deployed Advanced Mortar System (GDAMS)Publisher: ST Engineering | Note: Supports official GDAMS identity, ST Engineering manufacturer background, wheeled-platform integration context, rapid-deployment framing, blast-diffuser feature, and official image provenance. | Accessed: 2026-07-13GDAMS brochurePublisher: ST Engineering | Note: Supports GDAMS specifications, including caliber compatibility, crew, deployment and stowage time, range, traverse, elevation, laying speeds, accuracy, drop-fire mode, blast-diffuser note, digital fire-control notes, recoilless integration, and precision-guided 120 mm mortar-bomb compatibility. | Accessed: 2026-07-13Ground Deployed Advanced Mortar System - Babcock International GroupPublisher: Babcock International Group | Note: Supports Babcock/ST Engineering collaboration context, 120 mm GDAMS vehicle-agnostic carriage, two-person operation, 15-second deployment and stowage, standard smoothbore ammunition compatibility, digital communications, fire-control/targeting context, and UK production proposal. | Accessed: 2026-07-13Babcock, ST Engineering Unveil 120mm Mortar System at DVD 2024Publisher: DefenseMirror | Note: Supports Babcock and ST Engineering's DVD 2024 presentation of 120 mm GDAMS, Devonport production proposal, vehicle-mounted hinged mortar context, 15-second deployment and stowage, 9 km range, blast diffuser, digital communications, and UK indirect-fires framing. | Accessed: 2026-07-13IDEX 2025: Could ST Engineering's 120mm mortar be in the frame for UAE service?Publisher: Shephard Media | Note: Supports 2025 IDEX reporting on ST Engineering and International Golden Group regional marketing, GDAMS fitment to multiple chassis, and Toyota Land Cruiser and Supacat integration context. | Accessed: 2026-07-13ST Engineering promotes GDAMS mortar to foreign marketsPublisher: Asian Military Review | Note: Supports GDAMS DSEI 2023 unveiling context, vehicle-mounted and vehicle-agnostic design background, 700 kg mass, digital auto-laying, 15-second deploy/stow claim, qualification-testing context, prospective-customer trials, and UAE/IGG marketing context. | Accessed: 2026-07-13IDEX 2025 - ST Engineering GDAMS ready for qualification trialsPublisher: EDR Magazine | Note: Supports GDAMS DSEI 2023 unveiling context, live-firing demos and trials, Supacat Jackal and TAC-6/Land Cruiser 6x6 trial context, Alkantpan Test Range demonstrations, 700 kg system mass, and qualification-trial status. | Accessed: 2026-07-13ST Engineering Showcases Defence Innovations and Expands Global Partnerships at DSEI 2025Publisher: ST Engineering | Note: Supports GDAMS display at DSEI 2025, Light Reconnaissance Strike concept context, EAK-backed sensor-to-shooter integration, and display on three partner platforms. | Accessed: 2026-07-13Armormax Defence and ST Engineering demo mortar-mounted TAC-6 vehiclePublisher: DefenceWeb | Note: Supports TAC-6/GDAMS demonstration context, the 2025 Alkantpan range demonstration, PM120 GPS-guided ammunition carriage and demonstration, and GDAMS tactical-vehicle integration. | Accessed: 2026-07-13IDEX 2018: Singapore's ST Engineering launches SRAMS 120 mm Mk IIPublisher: Janes | Note: Supports SRAMS Mk II ammunition-suite context for linked ST Engineering 120 mm ammunition records. | Accessed: 2026-07-13Mortar BombsPublisher: ST Engineering | Note: Supports ST Engineering 120 mm extended-range mortar-bomb family compatibility with smooth-bore mortar systems. | Accessed: 2026-07-13Canada's Roshel develops mobile mortar systemPublisher: Defence Blog | Note: Supports CANSEC 2026 reporting that Roshel presented a Senator Pickup integrated with ST Engineering's GDAMS mortar system as a mobile mortar concept. | Accessed: 2026-07-13