India’s Agni‑5 Bunker Buster: Strategic Shift & Regional Impact

India’s development of a deep-strike bunker-buster variant of its Agni-5 ballistic missile marks a serious transformation in South Asia’s strategic landscape. Traditionally anchored in a doctrine of “No First Use” and “Credible Minimum Deterrence,” India is now signaling a shift toward pre-emptive conventional strike capabilities. The modified Agni-5, armed with a massive 7.5-tonne conventional warhead, is reportedly capable of penetrating 80 to 100 meters underground, designed specifically to destroy hardened nuclear and command-and-control infrastructure. While its range is reduced from 5,000+ kilometers to around 2,000–2,500 kilometers, it still covers all of Pakistan and key Chinese installations. This development, reportedly influenced by U.S. use of bunker-busting munitions in Iraq and Afghanistan, directly targets deeply buried strategic facilities in adversarial states.

Strategically, this move introduces a new form of asymmetry. By enabling conventional strikes on nuclear infrastructure without crossing the nuclear threshold, India has effectively lowered the bar for escalation. In any crisis, the temptation to use such a weapon for a pre-emptive decapitation strike could dangerously destabilize the region. It blurs the line between deterrence and aggression, undermining long-standing norms that helped prevent rapid escalation in past conflicts.

For Pakistan, India’s shift presents both a technological and doctrinal challenge. In response, Islamabad can explore multiple countermeasures. A key step can be improving the Anti-Ballistic missile system, which is already in process with the recent Pakistan-China weapons deal that included the acquisition of the Chinese HQ-19 anti-ballistic missile system, a mid-course interceptor capable of targeting incoming ballistic threats. When deployed, the HQ-19 would significantly enhance Pakistan’s ability to defend against high-altitude threats like Agni-5. Additionally, Pakistan may accelerate the hardening and dispersal of its strategic assets,

ensuring survivability through redundancy and mobility. Another path involves advancing indigenous missile systems to include deeper penetration and MIRV (Multiple Independently targetable Reentry Vehicle) capabilities. Importantly, Pakistan may reinforce its Full Spectrum Deterrence doctrine, which promises a calibrated nuclear response to conventional or sub-conventional threats. The presence of Indian deep-strike conventional weapons could, therefore, trigger a nuclear threshold sooner than anticipated.

In this rapidly evolving environment, the absence of arms control mechanisms or strategic dialogue greatly increases the risk of miscalculation. Without transparency, confidence-building, or crisis management frameworks, India’s pursuit of deep-strike capabilities, driven by its jingoistic government, could drive South Asia into a new and dangerous phase of arms competition and instability.