US Army Tests APEX Counter-UAS Round For Apache Helicopters In Arizona

US Army Tests APEX Counter-UAS Round To Strengthen Drone Defense

The APEX counter-UAS round is undergoing testing by the US Army at Yuma Proving Ground in Arizona as part of efforts to improve the military’s ability to defeat drones on the modern battlefield. The new 30mm Aviation Proximity Explosive munition is designed for use with the AH-64 Apache helicopter’s M230 chain gun and is intended to destroy unmanned aerial systems by detonating near the target rather than requiring a direct hit.

Army testers recently conducted live-fire evaluations at the Yuma Test Center, where crews fired approximately 1,200 rounds during a series of trials comparing the new munition with legacy ammunition and assessing its effectiveness against aerial targets.

The Big Picture

The US military’s rapid push for counter-drone technologies reflects a fundamental shift in modern warfare. Small and inexpensive unmanned aerial systems have become widely used for reconnaissance, targeting, and attack missions.

Recent conflicts have demonstrated the scale of this challenge. In the war between Russia and Ukraine, both sides rely heavily on small drones for surveillance and strike operations, forcing militaries to develop new tools to detect and destroy these systems.

Army leadership has increasingly prioritized counter-UAS capabilities across multiple domains. The service has expanded research and testing programs focused on sensors, electronic warfare, and kinetic solutions designed to counter both individual drones and coordinated drone swarms.

The APEX counter-UAS round represents a relatively low-cost kinetic option that could expand the Apache helicopter’s ability to engage aerial threats.

What’s Happening

Testing took place at the Yuma Test Center at US Army Yuma Proving Ground, one of the military’s largest testing facilities. The site includes nearly 2,000 square miles of restricted airspace, allowing safe aerial weapons testing from helicopters.

The APEX round closely resembles existing 30mm ammunition used by the Apache, including the M788 training round and the M789 high-explosive dual-purpose round. However, the new munition introduces a key feature.

Instead of detonating on impact, the round uses a proximity effect that allows it to explode just in front of a target drone. The resulting fragmentation pattern spreads outward to disable or destroy the unmanned aircraft.

During testing, crews conducted two main subtests:

• A comparison between the APEX round and legacy M789 ammunition
• Engagement trials against unmanned aerial systems

Apache crews also fired at ground targets and tested the round at both short and longer ranges.

To capture detailed performance data, testers used a range of instrumentation. Support assets included overhead scoring aircraft, telemetry systems, tracking mounts, high-speed video cameras, and multiple ground-based sensors.

Why It Matters

Counter-drone defense presents a difficult problem for traditional military weapons. Small drones are often fast, agile, and inexpensive, which makes it inefficient to use costly missiles against them.

Attack helicopters such as the Apache already carry a powerful 30mm cannon that can fire hundreds of rounds per minute. However, hitting a small drone directly with conventional ammunition can be challenging.

The APEX counter-UAS round addresses this issue by using proximity detonation and fragmentation. This increases the probability of destroying a drone even when the round does not score a direct hit.

If fielded, the munition could significantly expand the Apache’s defensive and offensive capabilities against small aerial threats.

Strategic Implications

Integrating counter-drone ammunition into existing weapons platforms could offer several operational advantages.

First, it allows helicopters already deployed in combat zones to engage drones without requiring specialized interceptors or additional systems.

Second, it improves layered air defense. Apache helicopters operating near forward units could provide mobile counter-UAS coverage against surveillance drones or loitering munitions.

Third, it supports the broader US military approach to distributed air defense, where multiple platforms contribute to detecting and defeating unmanned threats.

This concept is increasingly important as drones become more numerous and are used in swarms or coordinated attacks.

Competitor View

Strategic competitors are closely watching Western progress in counter-drone technology.

Russia has relied heavily on reconnaissance and loitering drones in Ukraine, while China has invested heavily in drone swarms and autonomous systems. Both nations have also developed their own counter-UAS technologies.

A weapon like the APEX counter-UAS round highlights a Western approach focused on adapting existing platforms to defeat drone threats quickly and cost effectively.

Rather than relying only on high-end missile interceptors, militaries are increasingly combining electronic warfare, directed energy weapons, and proximity-fused ammunition to create layered defenses.

What To Watch Next

The next major milestone for the program is an airworthiness release.

This certification would allow soldiers to safely fire the APEX round from Apache helicopters in operational settings once the munition becomes available. The release represents a critical step toward full materiel release and eventual fielding to Army units.

Additional testing may examine reliability, lethality against different drone types, and compatibility with Apache fire control systems.

Future evaluations could also explore how the round performs against drone swarms or fast-moving aerial targets.

Capability Gap

Modern militaries face a growing gap between the cost of defending against drones and the cost of deploying them.

A small commercial drone can cost a few thousand dollars or less, while intercepting it with a missile can cost hundreds of thousands of dollars.

The APEX counter-UAS round aims to close this gap by providing a low-cost engagement option using a weapon system already carried by Apache helicopters.

However, the munition also has limitations. It relies on the helicopter’s sensors and targeting systems to detect and track drones, which can be difficult against small or low-flying targets. It also remains a line-of-sight weapon with limited engagement range compared with missile systems.

The Bottom Line

The APEX counter-UAS round represents a practical step toward giving Apache helicopters an effective and cost-efficient weapon against the growing threat of battlefield drones.