Leopard 1 C3105 Upgrade for Ukraine
To give Ukraine’s older tanks a more defined role on the battlefield, John Cockerill is proposing an upgrade to the Leopard 1 C3105. The first upgraded Leopard 1, delivered in May 2025, is still in Ukraine following trials and may soon reach the front, according to the Belgian company that unveiled the concept at BEDEX 2026. Ukraine is in need of more than just armor. It requires tanks that are able to spot first, fire more quickly, and endure longer.
Why upgrading Leopard 1 C3105
The Leopard 1 is still useful because it can move, has been tested, and is already in use. But the turret and sights that came with it are from an older time. The Leopard 1 C3105 upgrade tries to fix that by replacing the old turret with John Cockerill’s 3105 system. In simple terms, it could make a tank from the Cold War into a better vehicle for fire support.
What the Cockerill 3105 changes
The new turret has a 105 mm high-pressure gun that can shoot standard NATO 105 mm rounds. The turret can also fire anti-tank weapons, such as the Falarick 105 family, which was co-developed with Ukraine’s Luch design bureau. According to John Cockerill’s own data, the autoloader can hold 12 to 16 rounds, has a camera that can see all around it, and can raise the gun from -10 to +42 degrees. It matters because the high angle is helpful in cities, on rough ground, and for indirect fire.
The views are also excellent. The official 3105 data says that day detection, recognition, and identification ranges are 18, 9, and 5 km. Those numbers are 15, 7, and 3.5 km in thermal mode. According to BEDEX, the commander and gunner also sit at the hull level instead of inside the turret. That layout could help keep the fighting module small and reduce exposure if it works well in battle.
Why indirect fire stands out
It’s clear that John Cockerill is pushing indirect fire as one of the most intriguing parts of this package. The BEDEX material says that the 3105 can do both direct and indirect fire missions, and the +42-degree elevation helps with high-arc fire. This function doesn’t turn a Leopard 1 into artillery. Still, it could let crews fire from better cover, help infantry in rough terrain, and use angles that most Western tank designs don’t like.
Protection & missiles: trade-offs
The Leopard 1 C3105 upgrade only adds more firepower. Survival is just as important. According to John Cockerill’s spec sheet, the armor can protect against threats up to STANAG 4569 Level 5. Other reports say it can protect against threats up to 25 mm of subcaliber. The 105 mm gun can also shoot Falarick missiles. According to official Luch data, the missile can travel up to 5 kilometers, be guided by a laser beam, and go through at least 550 mm of armor behind explosive reactive armor. So, the upgrade adds a guided long-range option to normal tank fire.
There are still limits, though. A new turret doesn’t change how old the Leopard 1 hull is. It also doesn’t make the tank into a heavy assault vehicle. The idea will succeed or fail based on how well it is integrated, maintained, supplied with ammunition, and trained. Furthermore, Ukraine needs systems that crews can quickly repair when they are under pressure. Any upgrade needs to be both tough and smart.
Outlook for Ukraine
This is not yet a signed program for the whole fleet. Tests, official product data, and a working prototype support the industrial offer, which is currently in Ukraine. If the Leopard 1 C3105 upgrade works well in battle, it could help Kyiv get more out of the tanks it already has faster. That is the main reason people like it. Ukraine could turn an existing platform into a better direct- and indirect-fire asset instead of waiting for a brand new one.
References
- https://johncockerill.com/en/press-and-news/news/bedex-2026/
- https://defense.johncockerill.com/wp-content/uploads/sites/5/2022/06/23606.jc-defense-3105-specsheet-a4h-en-hd.pdf
- https://johncockerill.com/en/press-and-news/news/the-cockerill-ct-cv-tm-weapon-system-advanced-105mm-successfully-demonstrated-its-gun-launched-missile-capability/
- https://www.luch.kiev.ua/en/production/antitank-guided-missiles-and-guidance-systems/falarick-105-round-comprising-antitank-guided-missile
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