Msi-Defence Systems
MSI-Defence Systems is a UK-based, MS INTERNATIONAL plc subsidiary that designs and manufactures fully-stabilised naval gun systems, land remote weapon stations, and counter-UAS platforms, serving over 40 navies and armed forces across 22+ countries.
- Company typePrivate
- Founded1899
- HeadquartersNorwich, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What Msi-Defence Systems does
MSI-Defence Systems Limited (MSI-DS), a wholly-owned subsidiary of the UK-listed conglomerate MS INTERNATIONAL plc, designs and manufactures fully-stabilised, high-accuracy weapon systems for naval and land platforms, with over 125 years of defence manufacturing heritage. Its core product portfolio centres on the SEAHAWK family of gun mounts (DS, LW, MWS, A3 variants) for calibre bands from 7.62mm to 40mm, the TERRAHAWK land product line (RWS, VSHORAD, PALADIN) covering remote weapon stations and mobile short-range air defence, and the SATOS electro-optical sensor and AZL submarine radar mast stabilised systems. MSI-DS holds intellectual property rights for the majority of its products, integrates third-party effectors (e.g. Northrop Grumman MK44s and M230LF cannons) and partners with primes (BAE Systems, Milrem Robotics, MBDA, SAAB UK, Supacat) for platform integration on ships, unmanned surface vessels, and ground vehicles.
MSI-DS generates revenue primarily through government defence procurement contracts for naval and land weapon systems, complemented by recurring through-life support services (Contractor Logistic Support, LRU repair, field service) covering over 300 installed gun systems across 22 countries, plus operator and maintainer training delivered at the Norwich facility or customer premises. Pricing is not publicly disclosed; contracts are negotiated directly with defence ministries, armed forces procurement bodies, and prime contractors. Distribution combines direct government sales with regional agents in Jordan (PSSD), UAE (Remah International Group), and Indonesia (BTI Defence), and a US subsidiary in South Carolina. The company serves navies, land forces, and constabulary agencies in more than 22 countries, with named end-users including the UK Royal Navy (all submarines fitted with AZL), Jordan Armed Forces, and BAE Systems, alongside 40+ international navies supplied with naval gun systems.
Operationally, MSI-DS runs a 16,000 square-metre enhanced manufacturing facility in Norwich and an ISO 9001:2015 / ISO 14001-certified quality management system. The company has actively pivoted from a pure-naval base into land weapons (TERRAHAWK RWS, 2019) and counter-UAS (TERRAHAWK VSHORAD and the 2023 TEAM UK C-UAS consortium), while integrating AI-enabled intelligent video tracking and semi-autonomous cue-and-slew capability into its fire control systems.
Msi-Defence Systems firmographics
Firmographics- Name
- Msi-Defence Systems
- Legal name
- MSI-Defence Systems Limited
- Website
- https://msi-dsl.com
- Company type
- Private
- Founded year
- 1899
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- MSI-Defence Systems is a UK-based, MS INTERNATIONAL plc subsidiary that designs and manufactures fully-stabilised naval gun systems, land remote weapon stations, and counter-UAS platforms, serving over 40 navies and armed forces across 22+ countries.
- Ownership category
- akta.pro rank
Msi-Defence Systems industry classification
Industry- Product category
- Defence Weapon Systems
- NAICS
- Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511)
- SIC
- Ordnance & Accessories, (No Vehicles/Guided Missiles) (3480), Search, Detection, Navagation, Guidance, Aeronautical Sys (3812), Industrial Instruments For Measurement, Display, And Control (3823)
- akta.pro primary industry
- Naval Weapons & Launch Systems (Guns, VLS, Torpedoes) (IMABAKAC)
- akta.pro secondary industry
- Autonomous Defense Systems (AI/ML, Swarming, MUM-T) (IMABAOAI)
Keywords
Where Msi-Defence Systems is headquartered
LocationHeadquarters
- HQ city
- Norwich
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
Msi-Defence Systems business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Technology or R&D, Operations, Infrastructure
Revenue model
- Defence Weapon Systems Sales: Sale of naval and land weapon systems including gun mounts, remote weapon stations, and VSHORAD systems. Revenue generated from equipment procurement contracts with government defence ministries.
- Through-Life Support and Maintenance: Comprehensive support services including Contractor Logistic Support, 24/7 telephone support, in-country depot maintenance facilities, on-demand field service support, LRU repair and replenishment. The company supports over 300 naval gun systems across 22 countries.
- Training Services: Training for operators, maintainers and depot support personnel tailored to specific customer needs, delivered at MSI-DS UK factory or customer premises.
Go-to-market motion2 records
Distribution channels2 records
Marketing channels7 records
Msi-Defence Systems product offering
Product offeringCore offering
MSI-Defence Systems (MSI-DS) is a UK-based designer and manufacturer of high-technology weapon system equipment for naval and ground forces. Its portfolio includes naval gun systems (SEAHAWK DS and LW series), remote weapon stations (SEAHAWK MWS A1, TERRAHAWK RWS), very short range air defence (VSHORAD) platforms (TERRAHAWK), multi-sensor surveillance and fire control systems (SATOS), and stabilised mast systems. The company also provides through-life support, maintenance, and training services for its equipment.
Product overview
MSI-Defence Systems is a world-leading defence systems company with over 125 years of experience, offering a comprehensive portfolio of naval gun systems, land-based weapon stations, and sensor/fire control solutions. The core SEAHAWK family includes the DS (Dual/Stabilised) series for primary/secondary naval roles, the LW (Lightweight) series for smaller vessels, the MWS (Multi Weapon Station) for compact naval applications, and the A3 deployable air defence variant. The TERRAHAWK product line extends the company's capabilities to land-based systems, including the RWS (Remote Weapon Station) and VSHORAD/PALADIN mobile air defence systems. Supporting these weapons platforms are the SATOS (Surveillance Acquisition Targeting Optical System) sensor suite and Stabilised Systems including the AZL Submarine Radar Mast. The company holds ISO 9001:2015 and ISO 14001:2004 certifications, operates a dedicated in-house support services team responsible for over 300 naval gun systems across 22 countries, and has unique IPR ownership for the majority of products enabling rapid innovation.
Differentiator
Problem solved
Functional benefit
Products and services
- MSI-DS SEAHAWK DS A1
Quantifiable outcome
- Best in class accuracy and dispersion demonstrated in BAE Systems P950 USV trials
- +2 more outcomes
Companies that use Msi-Defence Systems
Customer profileNamed customers4 records
Segments3 records
Ideal customer profiles3 records
Msi-Defence Systems technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration10 records
AI capability3 records
Feature6 records
Msi-Defence Systems partnerships and signals
Strategic signalPartnerships
16 partnerships are on record, tiered core and minor.
- BAE SystemscoreWorking in partnership during Commando Warrior exercise to demonstrate MSI-DS SEAHAWK MWS capabilities on the BAE Systems P950 Unmanned Surface Vessel. The MWS was selected as the 12.7mm Remote Weapon Station for the P950 USV demonstrator, with successful integration trials completed in late 2018 and firing trials in February 2019.
- Northrop GrummancoreIntegration partnerships for cannon systems. MSI-DS SEAHAWK LW accommodates Northrop Grumman MK44s 30mm cannon, and the Future Light Weapon System is based on the Northrop Grumman M230LF 30mm cannon.
- Milrem RoboticscoreIntegration of MSI-DS MWS A1 and TERRAHAWK RWS on Milrem Robotics THeMIS multi-role unmanned ground vehicle (UGV). Displayed at multiple exhibitions including World Defence Show 2022 and DSEI 2021.
- AM GeneralminorAM General exhibited the NXT 360 vehicle equipped with MSI-DS TERRAHAWK Remote Weapon Station at IDEX 2021.
- RADAcoreGround-based sensing, detection, and surveillance solution partnership. MSI-DS SATOS integrated with RADA Multi-mission Hemispheric Radar (MHR) to counter air targets including micro-drones. Showcased at Euronaval 2022, IDEX 2023, and Counter UAS Technology Europe Conference 2024.
- MS INTERNATIONAL plccoreMSI-DS is a major subsidiary of UK-based MS INTERNATIONAL plc, a publicly listed company. MS INTERNATIONAL has extensive experience in design, development, and supply of defence products.
- SupacatcoreJoint showcasing of MSI-DS SEAHAWK LW integrated with Supacat HMT Series vehicles. Displayed new deployment options for short range C-UAS air defence featuring LW30M, LW20G, and MWS at DVD 2024.
- MBDAcoreMember of TEAM UK C-UAS initiative showcasing integrated British counter-drone defence systems. Showcased with at MSPO 2024 and Eurosatory 2024 with Thales LMM missile options.
- SAAB UKcoreMember of TEAM UK C-UAS initiative - a joint-effort by leading British private enterprises in the C-UAS defence technology space.
- Openworks EngineeringminorMember of TEAM UK C-UAS initiative - a joint-effort by leading British private enterprises in the C-UAS defence technology space.
- Cambridge PixelminorMember of TEAM UK C-UAS initiative - a joint-effort by leading British private enterprises in the C-UAS defence technology space.
- MindFoundryminorMember of TEAM UK C-UAS initiative - a joint-effort by leading British private enterprises in the C-UAS defence technology space.
- ROMCOminorExhibition partner for IDEX 2021 at stand CP-250.
- PSSDminorRegional agent for SOFEX 2024 in Jordan.
- BTI Defence IndonesiaminorCollaboration for IndoDefence 2022 exhibition in Jakarta.
- Remah International GroupminorAssociation for IDEX 2025 exhibition.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
Msi-Defence Systems competitors and assessment
Company assessmentBroad incumbents
- Leonardo:
- Rheinmetall: Rheinmetall is a major German defence prime producing naval gun systems (e.g., MLG27, Oerlikon), air defence systems, and remote weapon stations. Directly overlaps with MSI-DS in small/medium-calibre naval guns and increasingly in land-based air defence and C-UAS.
- Thales: Thales is a global defence prime with a significant naval and land weapons portfolio, including 40mm and 76mm naval gun systems, and C-UAS solutions. Directly comparable to MSI-DS in naval gun stabilisation technology and increasingly in the short-range air defence space.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Msi-Defence Systems social profiles
Digital presenceMsi-Defence Systems compliance and trust
Trust signalCompliance3 records
Msi-Defence Systems financial estimates
Financial estimateRevenue estimate
Valuation estimate
Msi-Defence Systems leadership team
Management profileNumber of profiles
Profiles5 records
Msi-Defence Systems funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Msi-Defence Systems M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Msi-Defence Systems
What does Msi-Defence Systems do?
MSI-Defence Systems (MSI-DS) is a UK-based designer and manufacturer of high-technology weapon system equipment for naval and ground forces. Its portfolio includes naval gun systems (SEAHAWK DS and LW series), remote weapon stations (SEAHAWK MWS A1, TERRAHAWK RWS), very short range air defence (VSHORAD) platforms (TERRAHAWK), multi-sensor surveillance and fire control systems (SATOS), and stabilised mast systems. The company also provides through-life support, maintenance, and training services for its equipment.
Is Msi-Defence Systems a public or private company?
Msi-Defence Systems is a private company. It is classified as corporate owned and is currently operating.
When was Msi-Defence Systems founded?
Msi-Defence Systems was founded in 1899. It employs 51 to 100 people.
Where is Msi-Defence Systems based?
Msi-Defence Systems is headquartered in Norwich, United Kingdom, in the Europe region.
How does Msi-Defence Systems make money?
Three revenue lines are on record. Defence Weapon Systems Sales are the primary driver. The others are through-Life Support and Maintenance and training Services.
Who are Msi-Defence Systems's main competitors?
Broad incumbents on record are Leonardo, Rheinmetall and Thales.
Does Msi-Defence Systems have an API?
No public API is recorded for Msi-Defence Systems.
What industry is Msi-Defence Systems in?
Msi-Defence Systems's product category is Defence Weapon Systems. Its primary akta.pro industry code is IMABAKAC, Naval Weapons & Launch Systems (Guns, VLS, Torpedoes), with a secondary code of IMABAOAI, Autonomous Defense Systems (AI/ML, Swarming, MUM-T). Its NAICS code is 334511 and its SIC code is 3480.