PUNE / BALASORE : In a breakthrough that could significantly reshape India’s artillery doctrine, Bharat Forge has unveiled what it describes as the world’s first 155mm/52-calibre artillery gun mounted on a 4×4 high-mobility chassis, achieving a combination of firepower, mobility and weight reduction previously considered impractical. Weighing just 24 tonnes, the system has completed initial development and internal trials and is now set to undergo formal testing at the Proof and Experimental Establishment (PXE), Balasore, Odisha.
A New Class of Mobile Heavy Artillery
The newly developed gun system represents a radical departure from conventional mounted artillery platforms. Traditionally, 155mm/52-calibre guns — the global benchmark for long-range tube artillery — require heavy 6×6 or 8×8 trucks to absorb recoil forces and maintain firing stability. By contrast, Bharat Forge’s platform compresses the same firepower onto a compact 4×4 chassis, reducing overall mass by nearly seven tonnes when compared to the mounted variant of the Advanced Towed Artillery Gun System (ATAGS), which weighs around 31 tonnes.
Defence analysts say this weight reduction is not merely incremental but transformational. At 24 tonnes, the system crosses a long-standing threshold that has limited artillery deployment in mountainous and infrastructure-constrained regions.
Strategic Mobility for the Himalayas
Military planners have long sought a heavy gun that can be rapidly deployed in high-altitude terrain, particularly along the Line of Actual Control (LAC), where road width, bridge load classifications and steep gradients restrict the movement of heavier platforms. The lighter 4×4 configuration allows the gun to traverse narrow mountain roads and bridges that are inaccessible to conventional mounted systems.
The reduced weight and footprint also enhance strategic airlift capability. The system can be transported more efficiently by Indian Air Force heavy-lift aircraft, such as the C-17 Globemaster, enabling faster redeployment between theatres — a key requirement in a two-front contingency.
Firepower Without Compromise
Despite its lighter configuration, the gun retains the full advantages of the 155mm/52-calibre standard, offering superior range, muzzle velocity and lethality compared to older 39-calibre systems. Officials familiar with the programme indicate that the gun is expected to achieve ranges of 40–45 kilometres with standard ammunition, with the potential to exceed 50 kilometres using advanced extended-range and ramjet-assisted projectiles currently under development in India.
The system incorporates a semi-automatic loading mechanism, maintaining a high rate of fire while reducing crew fatigue and exposure. This feature is particularly important in high-altitude conditions, where physical exertion significantly affects sustained operations.
Recoil Management: The Core Challenge
The central technical question surrounding the project has been whether a 4×4 platform can withstand the intense recoil forces generated by a 52-calibre gun during sustained firing. Bharat Forge has addressed this through a combination of patented soft-recoil technology, reinforced chassis architecture and advanced hydraulic stabilisers designed to anchor the vehicle during firing sequences.
The upcoming Balasore trials will focus heavily on recoil absorption, firing accuracy, dispersion, system endurance and rapid redeployment after firing — a critical factor in modern artillery warfare dominated by counter-battery radars and precision strikes.
Filling a Critical Capability Gap
If the system successfully clears user trials, it could fill a long-standing gap between ultra-light towed howitzers, optimised for heli-lift operations, and heavy tracked self-propelled guns, which offer protection but lack strategic mobility in difficult terrain.
With an estimated indigenous content of around 85 percent, the platform aligns closely with the government’s Atmanirbhar Bharat objectives, reducing dependence on foreign artillery systems and creating a potential export product for nations facing similar terrain and infrastructure constraints.
Implications for India’s Artillery Modernisation
The Indian Army is in the midst of a major artillery modernisation drive, seeking a mix of towed, mounted and self-propelled systems tailored to diverse operational environments. A successful 155mm/52-calibre gun on a 4×4 chassis would introduce an entirely new category of artillery — combining long-range firepower, rapid shoot-and-scoot capability and exceptional deployability.
As the prototype moves to Balasore for its most critical evaluations yet, defence observers view the programme as a high-risk, high-reward effort. If validated, it could redefine how heavy artillery is designed, deployed and employed — not only for India, but for modern armies worldwide.
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