Canada Commits $1.4 Billion to Sovereign 155mm Ammunition Production: IMT Precision and General Dynamics Facilities to Reduce NATO Supply Chain Dependency

ISC Defence Intelligence

On 18 March 2026, Canada’s Minister of National Defence David J. McGuinty announced a $1.4 billion (CAD) investment to establish sovereign production of 155mm artillery ammunition under the Canadian Defence Industry Resilience (CDIR) Programme. The announcement, made at IMT Precision’s facility in Ingersoll, Ontario, represents the single largest Canadian investment in conventional ammunition manufacturing capacity since the Second World War and addresses a critical dependency within the NATO 155mm supply chain.

For Weapons, Ordnance, Munitions, and Explosives (WOME) professionals and NATO ammunition procurement officers, this investment signals a structural shift in how the Alliance approaches sovereign ammunition production — one that prioritises end-to-end domestic capability over just-in-time procurement from a narrow supplier base.

Investment Breakdown: Full Ammunition Assembly Chain

The CDIR funding covers four distinct manufacturing capabilities that together constitute a complete 155mm artillery ammunition production chain on Canadian soil:

• IMT Precision (Ingersoll, Ontario) — $305.4 million: New manufacturing facility for empty metal shells (projectile bodies) for 155mm artillery ammunition. At least 75 full-time positions, scaling to 400 jobs at full production capacity.
• General Dynamics – Ordnance and Tactical Systems (OTS), Quebec — $642 million: Production facility for complete 155mm High-Explosive (HE) projectiles, including explosive fill, fuze assembly, and final inspection.
• General Dynamics OTS, Quebec — $355.7 million: Nitrocellulose (NC) manufacturing facility for propellant production. NC is the base energetic material for virtually all NATO artillery propelling charges.
• General Dynamics OTS, Quebec — $57.9 million: Canada’s first production facility for M231/M232 155mm propelling charges. These modular charges are the standard NATO propelling charge system for 155mm howitzers.

The combined investment creates a vertically integrated production chain: IMT Precision produces the steel projectile bodies; General Dynamics fills them with high explosive, manufactures the propellant, and assembles the propelling charges. The only significant component not explicitly covered is fuze production, though this may fall within the HE projectile facility scope.

NATO 155mm Supply Chain Context

The investment must be understood against the backdrop of a NATO-wide 155mm ammunition supply crisis that has persisted since 2022. European Union (EU) production has reached over two million 155mm rounds per year as of early 2026, with a projected ceiling of 2.4 million annually. However, this production is concentrated among a small number of producers: Rheinmetall (Germany), KNDS (France/Germany), Nammo (Norway/Finland), and BAE Systems (UK). Canada’s current domestic production of 155mm ammunition is negligible by comparison.

The concentration of production in European facilities creates supply chain vulnerabilities that the CDIR investment directly addresses. A disruption at any single major European producer — whether from industrial accident, cyberattack, or capacity allocation to a specific national customer — would immediately affect NATO-wide ammunition availability. Canada’s entry as a sovereign producer adds geographic diversification and reduces the Alliance’s single-continent production dependency.

Energetic Materials: The Nitrocellulose Bottleneck

The $355.7 million nitrocellulose (NC) facility is arguably the most strategically significant element of the CDIR investment. NC is the base energetic material for single-base and double-base propellants used in NATO artillery propelling charges. Global NC production is concentrated among a handful of facilities, and the raw material supply chain (cotton linters or wood pulp, concentrated nitric and sulphuric acids) is subject to agricultural and chemical industry constraints that do not respond quickly to defence demand surges.

From a WOME technical perspective, NC manufacturing involves Hazard Division (HD) 1.1 and HD 1.3 processes depending on the stage of production, with significant Process Safety Management (PSM) requirements. The NC production process — nitration of cellulose using mixed acid, followed by washing, stabilisation, and drying — generates hazardous waste streams and requires specialised effluent treatment. Building a new NC facility is a multi-year engineering programme that cannot be accelerated beyond certain safety thresholds.

The M231/M232 propelling charge facility ($57.9 million) is described as Canada’s first of its kind. The M231 and M232 are modular artillery charge system (MACS) components used in 155mm/L39 and 155mm/L52 howitzers respectively, providing the standardised NATO propelling charge configuration that enables ammunition interchangeability across Allied artillery platforms — a topic ISC Defence Intelligence has previously analysed.

Impact Assessment

WOME Practitioner Guidance

For ammunition quality assurance (QA) personnel, the establishment of four new production facilities will require comprehensive supplier qualification against Allied Quality Assurance Publication (AQAP) 2110 Edition D and STANAG 4107. Canada, as a NATO member, must ensure that 155mm ammunition produced at these facilities meets the NATO Standardisation Agreement requirements for ammunition interchangeability (STANAG 4425). QA oversight will need to cover the full chain from NC production (chemical quality and stability testing per STANAG 4170) through shell body manufacture, explosive fill, and propelling charge assembly.

For logistics and storage planners, the new production will generate HD 1.1 (complete rounds and HE projectiles), HD 1.1 (NC in certain processing stages), and HD 1.3 (propelling charges in transport configuration) storage requirements at each facility and at downstream distribution points. Process Explosives Site (PES) licensing and Quantity Distance (QD) calculations per DSA 03.OME equivalent Canadian regulations will be required for all four facilities.