US–China Race for Ultra Long-Range Air Supremacy: AIM-174B, PL-15 and PL-17 Redefine Indo-Pacific Air Warfare

(DEFENCE SECURITY ASIA) — The accelerating US–China race for long-range air supremacy is reshaping the strategic geometry of the Indo-Pacific battlespace, as Washington and Beijing compete to dominate beyond-visual-range air combat through extreme-range air-to-air missiles capable of striking high-value airborne assets hundreds of kilometres away, fundamentally altering deterrence calculations around Taiwan, the South China Sea, and the Western Pacific.

This strategic shift was underscored when the United States Navy publicly unveiled the Ultra Beyond Visual Range Air-to-Air Missile AIM-174B the Rim of the Pacific (RIMPAC) 2024 exercise, signalling a deliberate American effort to counter China’s growing advantage in very-long-range beyond-visual-range air-to-air missiles already fielded by the People’s Liberation Army Air Force.

A defence analyst warned that “the last decade has seen a renewed emphasis on the demands of peer-on-peer air combat, with multiple Chinese AAM programmes acting as the baseline driving US and allied developments,” a statement that encapsulates how Chinese missile advancements have become the pacing threat for American airpower planning.

At the heart of this competition lies the transformation of air combat from traditional fighter-versus-fighter engagements into a contest focused on destroying airborne command, control, refuelling, and early-warning platforms, thereby collapsing an adversary’s ability to sustain high-tempo air operations across vast maritime distances.

The United States’ re-entry into the extreme-range air-to-air missile domain with the AIM-174B reflects a recognition within the Pentagon that existing weapons such as the AIM-120D AMRAAM no longer provide sufficient reach or kinematic dominance against Chinese missiles like the PL-15 and the even longer-ranged PL-17.

Justin Bronk, Senior Research Fellow for Airpower and Technology at the Royal United Services Institute, highlighted the urgency of this imbalance by stating that “China already deploys the PL-15 missile, which has better kinematics than the AIM-120D3, so there is an incentive” for the United States to field a weapon that restores credible long-range air denial capability.

The operational significance of this missile race is magnified by the Indo-Pacific’s sheer scale, where distances routinely exceed the combat radius of fighter aircraft, making the ability to engage targets at ranges of 300–400 kilometres a decisive factor in whether air forces can protect or neutralise critical enablers before they influence the outcome of a conflict.

In financial terms, the United States is committing billions of dollars to regain this edge, with each AIM-174B round derived from the SM-6 family estimated to cost several million US dollars per missile—potentially exceeding USD 4–5 million per unit (approximately RM18.8–RM23.5 million)—reflecting the premium placed on extreme-range aerial dominance.

This contest is not occurring in isolation, but is tightly integrated into broader anti-access and area-denial architectures, as China seeks to combine long-range air-to-air missiles with ballistic and cruise missile systems to push American carrier strike groups further east, while the United States aims to puncture this defensive envelope by eliminating Chinese airborne enablers at unprecedented distances.

As both powers accelerate development of next-generation missiles, sensors, and networked targeting architectures, the US–China race for long-range air supremacy has become one of the most consequential yet least publicly understood dimensions of modern great-power competition, with outcomes that will shape air warfare doctrine, alliance strategy, and crisis stability across Asia for decades to come.

AIM-174B: America’s Strategic Re-Entry into Extreme-Range Air Combat

The AIM-174B represents a decisive American recalibration of long-range air combat doctrine, as the United States Navy adapts the SM-6 surface-to-air missile into an air-launched configuration designed explicitly to counter Chinese very-long-range air-to-air threats in contested Indo-Pacific airspace.

First observed mounted beneath F/A-18E Super Hornets during RIMPAC 2024, the AIM-174B’s operational unveiling signalled that Washington is no longer willing to accept a range disadvantage against the People’s Liberation Army Air Force, particularly in scenarios involving protection of carrier strike groups operating within China’s expanding anti-access envelope.

With an estimated engagement range exceeding 400 kilometres and terminal speeds approaching Mach 3.5, the AIM-174B dramatically extends the reach of US naval aviation, enabling American fighters to engage high-value targets such as airborne early-warning aircraft, aerial refuellers, and command-and-control platforms well before they can support Chinese combat operations.

Unlike legacy air-to-air missiles that rely primarily on organic fighter radar guidance, the AIM-174B is optimised for network-centric warfare, drawing targeting data from E-2D Hawkeye airborne early-warning aircraft, surface combatants, space-based sensors, and distributed intelligence nodes across the battlespace.

This “kill web” approach reflects a doctrinal evolution in US airpower, prioritising distributed sensing and cooperative engagement to overcome increasingly dense electronic warfare environments where stealth degradation, jamming, and sensor denial are expected to be routine.

By removing the SM-6 booster stage for air-launch operations, the AIM-174B reduces overall length to under five metres while preserving the missile’s powerful dual-mode seeker and high-energy propulsion profile, allowing carriage on frontline carrier aircraft without requiring new airframe integration.

However, the missile’s substantial mass—approximately five times heavier than the AIM-120—limits carriage to two rounds per aircraft, imposing tactical trade-offs in speed, altitude, and payload flexibility that will influence how US Navy strike fighters are tasked during high-end conflict scenarios.

From a cost perspective, each AIM-174B is estimated to cost several million US dollars, potentially exceeding USD 4–5 million (RM18.8–RM23.5 million), underscoring that the weapon is intended for selective, high-impact engagements rather than mass employment against fighter formations.

Strategically, the AIM-174B restores an American capability not seen since the retirement of the AIM-54 Phoenix in 2004, reintroducing a long-range air denial tool designed to dismantle adversary air operations at the systemic level rather than through attritional fighter-on-fighter exchanges.

PL-15: China’s Game-Changing Beyond-Visual-Range Advantage

China’s PL-15 beyond-visual-range air-to-air missile represents one of the most consequential shifts in global air combat dynamics over the past decade, fundamentally challenging the long-standing dominance of the US-built AIM-120 AMRAAM family in modern aerial warfare.

Developed by the China Airborne Missile Academy, the PL-15 incorporates a dual-pulse solid-fuel rocket motor and an active electronically scanned array radar seeker, enabling sustained high-energy flight profiles and improved resistance to electronic countermeasures at extended engagement ranges.

Open-source assessments indicate that the domestic variant of the PL-15 possesses an engagement range exceeding 200 kilometres, with some estimates approaching 300 kilometres, while achieving terminal velocities above Mach 4, providing Chinese fighters with a decisive first-shot capability in many beyond-visual-range scenarios.

The missile’s integration across multiple platforms—including the J-20 halimunan fighter, J-16 multirole strike fighter, and export variants for allied air forces—has allowed the People’s Liberation Army Air Force to standardise long-range aerial engagement tactics across its combat fleet.

The operational credibility of the PL-15 was reinforced by reports of its combat use during a Pakistan-India air engagement, in which Pakistani aircraft armed with Chinese-supplied missiles were claimed to have successfully engaged Indian Rafale fighters, marking a symbolic milestone for China’s missile export strategy.

A Royal United Services Institute assessment noted that the PL-15 “outranges the US-made AIM-120C/D AMRAAM series,” highlighting how Chinese missile kinematics have forced Western air forces to reconsider assumptions about engagement geometry and survivability.

Crucially, the PL-15’s compact seeker and aerodynamic efficiency allow internal carriage on the J-20, preserving the aircraft’s halimunan signature while enabling it to prosecute long-range engagements without compromising survivability against advanced air defences.

This combination of range, speed, and stealth integration enables the PL-15 to dictate the terms of engagement, compelling adversary fighters either to disengage prematurely or operate at increased risk while attempting to close distance for missile employment.

In strategic terms, the PL-15 has become the benchmark against which all Western air-to-air missile developments are measured, effectively reversing decades of technological asymmetry that previously favoured US and allied air forces.

PL-17: China’s Airborne Weapon for Systemic Airpower Disruption

The PL-17 marks China’s transition from long-range fighter engagement toward systemic airpower disruption, as the missile is specifically designed to neutralise high-value airborne assets that underpin Western air operations across the Indo-Pacific theatre.

Measuring approximately six metres in length and assessed to possess an engagement range exceeding 400 kilometres, the PL-17 rivals—and in some estimates exceeds—the reach of the US Navy’s AIM-174B, placing American and allied enablers at unprecedented risk.

Optimised for carriage on large fighters such as the J-16, the PL-17 targets airborne early-warning aircraft, intelligence platforms, and aerial refuellers, aiming to collapse the command, control, and sustainment backbone of opposing air forces at the outset of a conflict.

Justin Bronk observed that “the PL-17 is probably most comparable to the AIM-174B, but the Chinese weapon might have a longer range,” underscoring concerns that China may currently possess an edge in very-long-range aerial engagement capability.

The missile is believed to employ a dual-mode guidance system combining AESA radar with additional passive or infrared sensing, enhancing its resilience against electronic warfare and enabling mid-course updates from off-board sensors.

Within China’s broader anti-access and area-denial architecture, the PL-17 complements ground-based ballistic and cruise missile systems by extending the denial zone into the air domain, complicating American efforts to project power from forward bases or carrier strike groups.

The deployment of PL-17-armed fighters forces the United States to allocate additional resources to protect vulnerable enablers, potentially diverting combat aircraft away from offensive missions and reducing overall operational tempo.

Speculation surrounding even more advanced Chinese missiles, including a potential PL-XX with hypersonic performance and ranges approaching 800 kilometres, suggests that Beijing views long-range aerial engagement as a cornerstone of future air dominance.

Collectively, the PL-17 represents a doctrinal shift in Chinese airpower, prioritising the destruction of an adversary’s operational nervous system rather than engaging in traditional fighter attrition.

Networked Warfare, Integration, and the Battle for the First Kill

The decisive variable in the US–China contest for long-range air supremacy is no longer missile range alone, but the degree to which extreme-range air-to-air weapons are integrated into resilient, networked targeting architectures capable of surviving intense electronic warfare and sensor denial.

The AIM-174B is fundamentally designed to exploit the United States’ advantage in multi-domain data fusion, drawing targeting information from E-2D Hawkeye airborne early-warning aircraft, space-based surveillance assets, surface combatants, and allied sensors to enable cooperative engagements well beyond the firing aircraft’s organic radar horizon.

This distributed targeting model allows US fighters to remain emission-controlled while prosecuting engagements at extreme range, reducing exposure to Chinese counter-detection systems and preserving survivability against increasingly capable passive detection networks.

China has pursued a parallel approach by integrating the PL-15 and PL-17 into a broader kill chain linking KJ-500 airborne early-warning aircraft, ground-based over-the-horizon radars, and satellite-based sensors, thereby extending the reach of its airpower deep into contested airspace.

The People’s Liberation Army’s rapid progress in artificial intelligence-enabled sensor fusion and data processing threatens to erode traditional Western advantages in information dominance, narrowing reaction times and compressing decision-making cycles during high-intensity aerial engagements.

In such an environment, the first effective missile shot becomes decisive, as fighters operating at ranges exceeding 300–400 kilometres may never visually acquire their adversaries before lethal engagements are concluded.

The United States’ reliance on network-centric warfare introduces vulnerabilities of its own, as space-based sensors and airborne command platforms become high-priority targets for Chinese PL-17-equipped fighters seeking to dismantle American kill chains at their source.

This dynamic creates a feedback loop in which each side’s pursuit of longer-range missiles drives an escalating contest over sensor survivability, electronic warfare resilience, and the protection of enabling assets rather than traditional dogfighting prowess.

Ultimately, long-range air supremacy in the Indo-Pacific will be determined not by the longest missile alone, but by which power can sustain an integrated, survivable, and adaptive targeting network under sustained kinetic and non-kinetic attack.

Strategic Consequences for Taiwan, the South China Sea, and Allied Airpower

The proliferation of extreme-range air-to-air missiles profoundly reshapes contingency planning around Taiwan, where control of the air domain would be decisive in determining the survivability of naval forces, amphibious operations, and reinforcement corridors.

PL-17-equipped Chinese fighters operating from mainland bases could threaten US and allied airborne early-warning aircraft and aerial refuellers far beyond the First Island Chain, complicating efforts to sustain continuous combat air patrols over the Taiwan Strait.

Conversely, the deployment of AIM-174B-armed Super Hornets enables US carrier air wings to contest Chinese airpower at standoff distances, potentially disrupting Beijing’s ability to mass air assets in support of an invasion or coercive campaign.

In the South China Sea, the presence of very-long-range air-to-air missiles amplifies the vulnerability of forward-deployed aircraft operating from austere island bases, where limited infrastructure constrains dispersal and rapid regeneration under missile threat.

Allied air forces operating US-built platforms stand to benefit from interoperability with American long-range missile architectures, particularly Australia, whose F/A-18F Super Hornets could theoretically integrate AIM-174B-class capabilities in coalition operations.

From a financial perspective, the costs associated with sustaining such high-end capabilities are substantial, as advanced air-to-air missiles priced at USD 4–5 million per unit (RM18.8–RM23.5 million) impose significant budgetary pressures even on well-resourced militaries.

China’s parallel investment in indigenous missile production, supported by scale and state-backed industrial capacity, may enable sustained deployment of PL-15 and PL-17 inventories at volumes that challenge Western stockpile resilience during prolonged conflict.

This asymmetry raises difficult questions for US and allied planners regarding missile expenditure rates, industrial surge capacity, and the sustainability of long-range air combat over extended campaigns.

As a result, long-range air-to-air missiles are no longer merely tactical weapons, but strategic instruments shaping alliance cohesion, deterrence credibility, and escalation management across the Indo-Pacific.

Long-Range Air Supremacy as the New Strategic High Ground

The US–China race for long-range air supremacy encapsulates the broader transformation of modern warfare, where technological integration, sensor dominance, and systemic disruption now outweigh traditional measures of fighter performance and pilot skill.

The AIM-174B restores a measure of parity to American naval aviation, reintroducing an extreme-range air-to-air capability designed to counter China’s growing inventory of long-range missiles and to protect vulnerable enablers operating across vast maritime theatres.

However, China’s PL-15 and PL-17 remain formidable benchmarks, reflecting a sustained and coherent investment in airpower designed to deny adversaries operational freedom rather than simply win individual engagements.

Douglas Barrie cautioned that “the US Navy has entered into service a very long-range air-to-air missile aimed at countering developments in Chinese air power,” underscoring that this competition is reactive as much as it is innovative.

The strategic balance remains fluid, as both powers pursue next-generation solutions including hypersonic air-to-air missiles, space-enabled targeting, and autonomous sensor platforms capable of extending engagement ranges even further.

Forecasts by the United States Air Force suggest that future adversary missiles could reach ranges of 1,000 miles by mid-century, a trajectory that would fundamentally redefine air combat and place unprecedented pressure on escalation control mechanisms.

In this evolving environment, extreme-range air-to-air missiles function as both deterrents and destabilisers, capable of neutralising critical assets early in a conflict while simultaneously increasing incentives for pre-emptive action.

The Indo-Pacific skies are therefore becoming a contested strategic high ground, where dominance will be determined by integration, resilience, and adaptability rather than numerical superiority alone.

As Washington and Beijing continue to push the boundaries of long-range air combat, the margin for miscalculation narrows, ensuring that the race for air supremacy remains one of the most consequential—and dangerous—dimensions of twenty-first-century great-power rivalry. — DEFENCE SECURITY ASIA