Belgium's John Cockerill Reveals FENRIS 6x6 with NATO 105mm Gun for Mobile Direct Fire Support.

Belgian Company John Cockerill Defense has unveiled the FENRIS at Eurosatory 2026, introducing a 26-ton 6x6 armored combat vehicle armed with a NATO-standard high-pressure 105 mm gun, a combination the company says is unique on today’s market. The new platform delivers tank-level direct-fire capability in a lighter and more deployable format, giving reconnaissance and medium-weight forces greater firepower without the mobility and logistical burden of a main battle tank.

Developed after John Cockerill Defense’s acquisition of Arquus, FENRIS pairs a purpose-built 6x6 chassis with the lightweight Cockerill 3105 turret to create a highly mobile precision-fire platform. Its design reflects a growing demand for armored vehicles that combine strategic mobility, operational flexibility, and heavy firepower, offering commanders a powerful option for rapid-response, expeditionary, and high-intensity combat operations.

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Belgian Company John Cockerill Defense unveils the new FENRIS 6x6 armored combat vehicle at Eurosatory 2026, combining a NATO-standard 105 mm high-pressure cannon with a 26-ton wheeled chassis designed for reconnaissance, direct-fire support, and rapid strategic deployment. (Picture source: Army Recognition Group)

The FENRIS debut comes as armed forces worldwide seek alternatives to heavier armored formations that are increasingly difficult to deploy, sustain, and maneuver across vast operational areas. Unveiled nearly two years after John Cockerill Defense acquired Arquus, FENRIS illustrates how the combined company intends to address growing demand for highly mobile combat systems capable of delivering direct fire support against armored vehicles, fortified positions, and enemy reconnaissance elements.

FENRIS is built around a newly developed Arquus 6x6 chassis rather than an adapted legacy vehicle. The design was engineered specifically to accommodate the Cockerill 3105 turret and its NATO-standard high-pressure 105 mm gun while preserving mobility and transportability. According to the company, the vehicle weighs 26 tonnes in combat configuration and is powered by a 500-horsepower engine optimized for high torque output and low acoustic signature.

The emergence of systems such as FENRIS reflects lessons drawn from recent conflicts where mobility, operational reach, and rapid deployment have become as important as armor protection. Large tracked formations remain essential for high-intensity warfare, but many military operations require combat vehicles that can cover long distances quickly, deploy with limited logistical support, and engage a wide spectrum of battlefield targets.

For reconnaissance formations, direct-fire capability has become increasingly important. Modern reconnaissance units are often required to operate far ahead of friendly forces while confronting adversaries equipped with infantry fighting vehicles, wheeled armored vehicles, and even main battle tanks. The 105 mm gun gives FENRIS the ability to engage and defeat such threats while retaining the agility expected from a reconnaissance asset.

The choice of a high-pressure 105 mm weapon is particularly significant. The caliber offers a balance between firepower, ammunition versatility, and vehicle integration that many armies continue to value. Compatible with standard NATO ammunition, the gun can engage armored vehicles, hardened structures, infantry positions, and urban targets without requiring specialized munitions unique to a single user.

Medium and light infantry brigades represent another potential market for the vehicle. Many such formations lack organic heavy firepower and often rely on anti-tank missiles, artillery support, loitering munitions, or airpower to neutralize fortified positions and armored threats. While these assets remain effective, their availability cannot always be guaranteed. A wheeled combat vehicle carrying a 105 mm gun provides commanders with an immediately available direct-fire solution capable of responding to rapidly evolving battlefield conditions.

Arquus placed particular emphasis on mobility during the vehicle's development. The chassis incorporates active suspension technology allowing crews to adjust ride height and vehicle attitude according to terrain and tactical requirements. Combined with large-diameter tires and a centralized tire inflation system, the suspension enhances cross-country performance and obstacle negotiation while improving survivability.

The ability to lower the vehicle's profile offers additional tactical advantages. Crews can exploit terrain more effectively, reducing exposure while observing or engaging targets. Such capabilities are commonly associated with advanced main battle tanks and remain relatively uncommon among wheeled armored combat vehicles.

At the center of the vehicle sits the Cockerill 3105 turret, which the company describes as the lightest operational 105 mm turret currently available. Weight reduction is critical because it allows the vehicle to maintain high mobility without sacrificing firepower. The turret integrates a two-axis stabilized main armament and a digital fire-control system incorporating artificial intelligence functions to support target acquisition and engagement.

The weapon system offers substantial elevation and depression angles, enabling engagements in mountainous terrain, urban environments, and reverse-slope positions. The gun can also deliver indirect fire when operational circumstances require additional fire support, expanding its utility beyond conventional direct-fire missions.

A notable feature of FENRIS is the integration of counter-drone protection directly into the turret architecture. The vehicle incorporates the latest Hornet-S commander's sight in a C-UAS configuration that combines radar sensors with a 7.62 mm MAG 58 machine gun. This arrangement enables autonomous detection and engagement of aerial threats while avoiding the need for separate anti-drone systems mounted on the vehicle.

The inclusion of organic counter-UAS capability reflects the growing threat posed by reconnaissance drones, FPV attack drones, and loitering munitions across modern battlefields. Armored vehicles are increasingly required to defend themselves not only against conventional anti-armor weapons but also against persistent aerial surveillance and low-cost precision attack systems.

FENRIS is not intended to replace modern main battle tanks. Instead, it occupies a different operational niche focused on reconnaissance, expeditionary operations, rapid deployment, and direct fire support for medium-weight formations. Its wheeled configuration offers greater strategic mobility than tracked armored vehicles while reducing logistical demands and life-cycle costs.

The vehicle also highlights the industrial logic behind John Cockerill Defense's acquisition of Arquus. FENRIS is the first major combat vehicle program born from the integration of Arquus mobility expertise and Cockerill's turret and weapon system portfolio. The result is a combat vehicle designed around a requirement increasingly visible across global defense markets: combining heavy direct-fire capability with the speed, deployability, and operational flexibility demanded by modern land warfare.

As armies continue to reassess force structures in response to lessons from Ukraine, the Middle East, and other operational theaters, interest is growing in combat vehicles that bridge the gap between infantry fighting vehicles and main battle tanks. FENRIS enters this evolving segment with one of the most powerful armament packages currently available on a wheeled combat vehicle of its size, offering armed forces a new option for delivering mobile, protected, and immediately responsive firepower.

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Written by Alain Servaes – Chief Editor, Army Recognition Group
Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years of experience in defense journalism, he provides expert analysis of military equipment, NATO operations, and the global defense industry.