Saab HEAT 758 Carl-Gustaf Anti-Tank Round Defeats ERA to 700mm
700 mm
RHA Penetration Behind ERA
84 mm
Carl-Gustaf Calibre
50,000
ML-Modelled Precursor Designs
🔵 The Announcement
Saab Launches HEAT 758 at Karlskoga Live-Fire Demonstration
Saab on 7 May 2026 publicly launched a new anti-tank ammunition round for its Carl-Gustaf 84mm recoilless weapon system, designated HEAT 758, during a live-fire customer demonstration at the company’s Karlskoga facility in Sweden. The round is explicitly designed to defeat heavy armoured vehicles fitted with Explosive Reactive Armour, the bolt-on protection blocks that have become standard on Russian main battle tanks across the war in Ukraine and that are increasingly proliferating to other operators. Saab states that an undisclosed customer has already placed an order for HEAT 758 and that production is underway.
The launch was reported in parallel by Soldier Systems Daily, Defence Industry Europe, Army Technology, Joint Forces News, Calibre Defence and New Atlas, all citing the Karlskoga demonstration and Saab’s accompanying press materials. The announcement places HEAT 758 in a line of dedicated tandem-warhead munitions for the Carl-Gustaf and signals that Sweden’s largest defence prime is now treating the post-2022 ERA proliferation as a stable threat profile rather than a passing tactical wrinkle.
🔴 The Round
Tandem Warhead, Copper Liner, 700mm Behind ERA
HEAT 758 is an 84mm tandem high-explosive anti-tank round built around a copper-lined main charge and a separate non-initiating precursor charge. The precursor strikes first, detonating or neutralising any ERA tile in the impact path; the main charge then engages the underlying armour through the gap. Saab states the main charge can penetrate up to 700mm of Rolled Homogeneous Armour after defeating ERA, which exceeds the figure of roughly 500mm previously associated with its predecessor, the HEAT 751, according to Calibre Defence’s reporting from the demonstration.
Independent technical reporting from New Atlas adds further detail: a muzzle velocity of approximately 255 m/s, a round weight of roughly 7 kilograms, an overall length under one metre, and an effective engagement range published as up to 700 metres. Calibre Defence cited a slightly more conservative figure of 600 metres using rocket-motor assistance, noting that during the live-fire event the round was fired at 500 metres against a salvaged Soviet tank hull. Both figures sit within the operational envelope of the Carl-Gustaf M4 in standard infantry use.
One of the more unusual disclosures concerns design methodology. A Saab representative briefing journalists at Karlskoga, quoted by Calibre Defence, said the company ran roughly 50,000 simulated precursor configurations through machine-learning tools in order to find a profile that would reliably defeat the full known catalogue of Russian ERA, from the early Kontakt-1 blocks of the 1980s through to the Malakhit suite associated with the T-14 Armata. That is a meaningful claim: it places generative simulation directly inside warhead design, not just in supporting analytics.
🟡 The Firebolt Link
Smart Round Talking to a Smart Fire Control Device
HEAT 758 incorporates Saab’s Firebolt technology, a digital data link between the round, the Carl-Gustaf M4 launcher and the Fire Control Device 558 aiming unit. In practical terms, the round reports its identity, propellant temperature and ballistic profile directly to the fire control system, which then computes the firing solution without the gunner needing to dial in ammunition type or correct for temperature manually. Saab states the system simplifies the gunner’s workload and increases first-round hit probability.
This is the recoilless-rifle equivalent of the digital interface now standard on Western tank guns and shoulder-fired anti-aircraft systems. The infantry anti-tank rocket, long the most analogue corner of the dismounted arsenal, is being pulled into the same data ecosystem as everything else the dismounted squad carries. For a two-soldier Carl-Gustaf crew operating under fire against a moving target with active or reactive armour, the difference between a first-round hit and a missed engagement is usually measured in seconds, and Firebolt is engineered to remove that decision burden from the gunner.
Michael Höglund : Head of Saab Ground Combat, 7 May 2026
“This round is our response of developments of the battlefield where reactive explosive armour has become a major problem for regular munitions trying to defeat armoured vehicles. HEAT 758 is an example of how Saab continues to generate ever more capable products while decreasing the armoured vehicle threat to the operator.”
🟢 Why It Matters
ERA Has Become the Default, and Infantry Munitions Are Catching Up
The Ukraine war has stripped a lot of theory out of the ERA discussion. Russian armour in the field is now routinely seen wearing layered Kontakt-5, Relikt, and improvised cage-and-slat additions over the original reactive blocks, while T-90M and T-72B3M variants carry factory-standard ERA suites optimised against tandem HEAT and top-attack munitions. Western dismounts firing Carl-Gustafs, AT4s and similar legacy single-charge HEAT rounds have repeatedly demonstrated that the first warhead is consumed by the ERA layer and the underlying armour is not breached.
A round like HEAT 758 is the direct industrial answer to that observed problem. The tandem precursor is not new in principle, but a 700mm RHA penetration figure behind ERA, delivered from a shoulder-fired 84mm system carried by two soldiers, sits at the upper end of what infantry-portable anti-armour has historically offered. For comparison, that penetration figure is in the same band as some larger crew-served and vehicle-mounted anti-tank guided missiles, though those systems retain range advantages measured in kilometres rather than hundreds of metres.
The Carl-Gustaf user community is substantial. The M4 variant is in service with the United States Army and Marine Corps, the British Army, the Australian Defence Force, the Indian Army, the Swedish Armed Forces and a long list of NATO and non-NATO operators. Saab has not named the launch customer for HEAT 758, but the customer pool is wide and existing M4 fleets are software-compatible with the Firebolt data link, which simplifies fielding considerably.
Strategy Battles Assessment
HEAT 758 is a deliberate response to a battlefield Sweden has been quietly studying for four years.
Three things stand out in this announcement, and only one of them is the penetration number. The first is that Saab is publicly framing ERA as a problem its customers expect to keep encountering, which is an implicit forecast about the next decade of conventional land war. The second is the candid disclosure that machine learning ran through 50,000 precursor configurations to find a profile that defeats the full Russian ERA catalogue: that is a procurement signal as much as an engineering one, because it tells customers Saab now treats warhead design as a data problem rather than a craft problem, with all the iteration speed and customer-specific tuning that implies. The third is Firebolt. A digital handshake between an infantry round and a fire control device is a small detail that ages well: it lets future variants of the round, sensor fuzes, range-corrected models or programmable airburst options be fielded against the same launcher without requalifying the gunner. The combination of a hardware fix for ERA, a software fix for gunner workload, and a confirmed launch order means HEAT 758 is not a concept piece. It is a fielded munition with a customer, and its appearance now suggests Saab expects the Carl-Gustaf system, fifty-eight years on from its first model, to remain relevant well into the 2030s.
Strategy Battles Related Coverage
Sources
- Saab Group, “Saab launches new Carl-Gustaf anti-tank round”, press release, 7 May 2026
- Army Technology, “Saab unveils new Russian tank-killer round”, 7 May 2026
- Calibre Defence, “Saab launches HEAT 758: a new round to defeat Russian reactive armour”, 7 May 2026
- New Atlas, “Saab HEAT 758: New Carl-Gustaf round defeats modern reactive armour”, 8 May 2026
- Soldier Systems Daily, “Saab Launches New Carl-Gustaf Anti-Tank Round”, 7 May 2026
- Defence Industry Europe, “Saab unveils new HEAT 758 anti-tank round for Carl-Gustaf system during live demonstration in Sweden”, 7 May 2026
- Joint Forces News, “Saab Launches New Carl-Gustaf Anti-Tank Round”, 7 May 2026
Editorial Verification
Michael Höglund statement (Head of Saab Ground Combat): 7 independent sources verified (Saab Group press release, Army Technology, Calibre Defence, New Atlas, Soldier Systems Daily, Defence Industry Europe, Joint Forces News). Karlskoga live-fire demonstration: confirmed by Calibre Defence reporting from the event and Saab official materials. The unnamed “50,000 ML-modelled precursor designs” figure originates from a single Saab representative briefing journalists at Karlskoga, reported by Calibre Defence; it is single-source attributed and is presented in this article as a Saab claim rather than as independently verified. Customer identity for the launch order has not been disclosed by Saab and is therefore not stated in this article. Penetration figure of 700mm RHA behind ERA is a Saab manufacturer specification and is reported as such; range figures vary between sources (Saab: up to 700m; Calibre Defence: 600m with rocket motor assist; live-fire engagement at Karlskoga conducted at 500m).
This article does not include a geospatial map. The event is an industry product launch and live-fire demonstration at a manufacturer facility (Saab Bofors Test Centre, Karlskoga, Sweden); it is not a kinetic operation and does not meet the criteria for an MGRS-mapped article.
All claims independently attributed and verified to open sources where possible.
Approved for Publication
Marcus V. Thorne
Lead Editor, Strategy Battles
©StrategyBattles.net 2026
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