In the demanding world of tactical operations, self-defense, and competitive shooting, every fraction of a second and every shred of visibility can be the difference between success and failure. For serious users who require the ultimate in reliability, speed, and precision, the SureFire X400UH-A-RD Weapon Light with Red Laser stands as a pinnacle of innovation. This advanced illumination and targeting system is meticulously engineered to address the critical needs of professionals and discerning enthusiasts alike, offering a seamless integration of powerful light, pinpoint laser accuracy, and revolutionary holster compatibility.

Why Choose the SureFire X400UH-A-RD? Solving Critical Challenges in Low-Light Environments

Are you frequently operating in low-light conditions, where positive target identification and rapid engagement are paramount? Do you need a weapon-mounted accessory that not only provides superior illumination but also enhances your ability to acquire targets swiftly and accurately, even from unconventional shooting positions? The SureFire X400UH-A-RD is designed specifically to answer these vital questions and overcome common challenges faced by firearms users.

This isn't just another weapon light; it's a comprehensive tactical tool built for those who demand uncompromising performance. It’s for the law enforcement officer clearing a dark building, the homeowner facing an unexpected threat, or the competitive shooter navigating a complex, low-light stage. The X400UH-A-RD ensures you can identify potential threats, assess situations with clarity, and engage with confidence, making it an indispensable asset for anyone serious about their operational readiness.

Revolutionary Masterfire Holster Integration: Speed and Efficiency Redefined

One of the most groundbreaking features of the SureFire X400UH-A-RD is its unique design for seamless integration with SureFire's revolutionary Masterfire Rapid Deploy Holster. This isn't merely compatibility; it's a synergistic design that redefines weapon deployment and readiness. The X400UH-A-RD features a specialized bezel with cam slots and pin slots strategically placed on both sides of its robust body. These precision-engineered slots are the key to its unparalleled interaction with the Masterfire holster, allowing the weapon light to securely lock into the holster. This secure retention positions the firearm at an advantageous angle, optimizing it for lightning-fast deployment.

What truly sets this system apart is the automatic activation feature. When paired with the Masterfire holster, the X400UH-A-RD is designed to automatically illuminate the moment your weapon is drawn. This crucial functionality saves invaluable time in high-stress situations where every millisecond counts. Imagine a scenario where you need to draw your firearm and immediately engage a threat in darkness. With the X400UH-A-RD and Masterfire holster, there's no fumbling for switches; the light is on, and the laser is active, allowing for immediate focus on the target. This automatic activation also significantly simplifies one-handed manipulations, a critical advantage when one hand is occupied with other tasks, such as opening a door or assisting a teammate.

Unmatched Illumination: The Power of 1000 Lumens

At the heart of the X400UH-A-RD's illumination capability is a powerful, recoil-proof LED emitter. This advanced LED delivers a staggering 1000 lumens of brilliant white light, making it one of the most potent weapon lights on the market. But raw lumen output is only part of the story; how that light is delivered is equally important. SureFire utilizes a proprietary Total Internal Reflection (TIR) lens, which is expertly engineered to focus this immense light into a highly effective beam profile. The result is a smooth, far-reaching beam with a large, bright central spot, complemented by a useful periphery of spill light. This beam pattern is ideal for both close-quarters combat (CQB) and engagements at moderate distances, providing superior situational awareness without creating distracting hot spots or tunnel vision.

The ability to cast a beam up to 213 meters (approximately 233 yards) ensures that targets at considerable distances are clearly visible, while the sheer intensity of 1000 lumens can be disorienting and suppressive to an aggressor, providing a critical tactical advantage. This level of illumination is essential for positive target identification, ensuring you can distinguish between a threat and a non-threat in the blink of an eye, a fundamental requirement for responsible self-defense and tactical operations.

Pinpoint Precision: The Highly Visible Red Laser Sight

Beyond its powerful illumination, the X400UH-A-RD incorporates a highly effective 5-milliwatt (5mW) red laser sight. Operating at a wavelength of 635 nanometers (nM), this red laser is optimized for maximum visibility to the human eye, even in challenging lighting conditions. The laser provides an instantaneous and intuitive aiming point, dramatically speeding up target acquisition and improving accuracy, especially when shooting from awkward positions or when maintaining a traditional sight picture is difficult or impossible.

One of the persistent concerns with weapon-mounted lasers is their ability to hold zero under the punishing effects of recoil. SureFire addresses this with a superior engineering solution: the X400UH-A-RD utilizes Nylok adjustment screws for its windage and elevation adjustments. These specialized screws are designed to resist loosening due to vibration and recoil, meaning that once your laser is zeroed, it rarely needs re-zeroing. This unparalleled zero retention is a testament to SureFire's commitment to reliability and precision, giving users complete confidence in their aiming point when it matters most.

Built to Endure: Uncompromising Durability and Weather Resistance

A tactical tool is only as good as its ability to withstand the harshest environments and demands of real-world use. The SureFire X400UH-A-RD is constructed from a lightweight yet immensely strong aerospace-grade aluminum body. This premium material provides an exceptional strength-to-weight ratio, ensuring the light adds minimal bulk to your firearm (weighing in at just 5.90 ounces) while offering robust protection against impacts and drops.

Further enhancing its resilience, the entire body is finished with a Mil-Spec hard anodizing. This specialized coating doesn't just provide a sleek black appearance; it delivers superior resistance to abrasion, corrosion, and extreme temperatures, ensuring the X400UH-A-RD maintains its integrity and performance through countless training sessions and critical incidents. To safeguard its internal components from environmental ingress, the light features meticulous O-ring and gasket sealing, making it thoroughly weatherproof. This means you can trust the X400UH-A-RD to perform flawlessly in rain, snow, humidity, or dusty conditions, ensuring consistent operation regardless of the environment.

Intuitive Control and Broad Compatibility

Designed for immediate and intuitive operation, the X400UH-A-RD features ambidextrous switching conveniently located at the rear of the body. This thoughtful design provides natural, one-finger control for both momentary-on and constant-on activation, ensuring seamless operation for both right-handed and left-handed shooters without requiring awkward hand positioning. The switch allows for quick toggling between light only, laser only, or light-and-laser combined modes, giving the user flexibility to adapt to various tactical situations.

Versatility is key for any modern weapon accessory. The X400UH-A-RD can be easily and securely attached to virtually any pistol or long gun equipped with a universal or Picatinny rail. This broad compatibility ensures that whether you're outfitting a full-size handgun for duty use or adding illumination and aiming capabilities to a carbine, the X400UH-A-RD provides a reliable and stable mounting solution. Its compact overall length of 3.70 inches ensures it integrates cleanly with most firearm platforms without excessively extending beyond the muzzle or interfering with holsters (outside of the Masterfire system, of course).

Power and Runtime: Ready When You Are

The SureFire X400UH-A-RD is powered by reliable CR123A batteries, known for their stable power output and long shelf life. With a runtime of 1+ hours, the X400UH-A-RD provides sufficient operational time for most tactical scenarios, training sessions, or self-defense needs. For sustained use or high-intensity operations, having spare CR123A batteries on hand is always recommended. The efficiency of the LED and laser systems ensures that the power is utilized effectively, maximizing performance for the duration of the battery life.

Answering Your Questions About Tactical Weapon Lights and Lasers

• What's the difference between a weapon light and a regular flashlight? Weapon lights like the SureFire X400UH-A-RD are purpose-built to withstand firearm recoil, integrate seamlessly onto a rail system, and offer specific features like momentary activation, ambidextrous controls, and often, integrated lasers. Regular flashlights lack the durability and mounting solutions required for reliable firearm use.
• How important are lumens for a tactical weapon light? Lumens indicate brightness. For tactical use, higher lumens (like the X400UH-A-RD's 1000 lumens) are critical for positive target identification at distance, disorienting threats, and cutting through environmental obscurants like smoke or fog.
• Why is Masterfire holster compatibility a significant advantage? This unique system provides automatic light/laser activation upon drawing the weapon, saving crucial time and allowing for one-handed operation. It also offers secure weapon retention with rapid deployment capabilities.
• Will the red laser be visible in daylight? While red lasers are most effective in low light, the 5mW (635nM) output of the X400UH-A-RD's red laser can be visible in shaded daylight conditions or at closer ranges, offering a quick aiming reference. Its primary strength, however, lies in its low-light performance.
• How durable is the SureFire X400UH-A-RD? Constructed from aerospace-grade aluminum with Mil-Spec hard anodizing and comprehensive O-ring/gasket sealing, it is designed to be highly resistant to impact, abrasion, corrosion, and weather, ensuring exceptional longevity and reliability. It's built to be recoil-proof.
• Can I use this weapon light on different firearms? Yes, its universal and Picatinny rail mounting system allows for easy and secure attachment to a wide range of handguns and long guns equipped with such rails, offering excellent versatility.

The SureFire Standard: Trust and Innovation

SureFire has long been synonymous with uncompromising quality, innovative design, and battlefield-proven reliability in the world of tactical illumination. The X400UH-A-RD embodies this legacy, offering a robust, feature-rich solution for those who cannot afford compromise when their safety or mission success is on the line. Every component, from the high-output LED and precision TIR lens to the recoil-proof laser and Mil-Spec anodized body, is crafted to the highest standards, ensuring that when you activate your SureFire X400UH-A-RD, it performs exactly as expected, every single time.

Whether you are a professional operating in the field, a dedicated enthusiast seeking to optimize your self-defense capabilities, or a competitive shooter looking for an edge in dynamic stages, the SureFire X400UH-A-RD represents a significant upgrade to your firearm's capabilities. Its seamless integration with the Masterfire holster system, combined with powerful illumination and precise laser targeting, makes it an unparalleled choice for serious users.

The SureFire X400UH-A-RD, like other premium SureFire products known for their reliability and performance, is readily available from reputable firearms accessory retailers such as DEGuns.com.