Surefire X300U-A Ultra Weapon Light with Rail-Lock Mounting, LED, 2 CR123A Batteries, Aluminum Construction

The Surefire X300U-A Ultra weapon light is a compact, high-output mounted light built for serious defensive and tactical use on pistols and rifles. It pairs a recoil-proof LED producing 1,000 lumens with a Total Internal Reflection lens that shapes the beam into a usable far-reaching center spot and useful peripheral surround light—the balance you need to move from close quarters to medium distance without sacrificing situational awareness. Runtime is approximately 1.5 hours per set of batteries, giving you reliable runtime through extended training or duty scenarios.

The light's Rail-Lock mounting system snaps onto standard Universal or Picatinny rails with minimal fuss and zero shift under recoil. The housing is high-strength aerospace aluminum, Mil-Spec hard anodized for durability, and sealed to 22 meters submersion depth—tough enough for harsh field conditions and water crossings. The integral ambidextrous push/toggle switch delivers one-handed momentary or constant-on activation without adjusting your grip. For pistol work, optional grip switches are available; long gun shooters can run an optional XT07 tape switch to activate the light hands-free.

Surefire's X300U-A stands out in the mounted light category because it's genuinely fast to attach and detach—a real advantage if you're running the same light between different platforms or need to swap between mounted and handheld configurations. The LED is virtually indestructible and efficient enough to deliver tactical-level light that overwhelms dark-adapted vision without draining batteries prematurely. Whether you're training on the clock, working a duty shift, or building a home-defense rifle, this light doesn't ask you to compromise on output, durability, or usability.

Comes with 2 CR123A batteries.

Key Features

• 1,000-lumen recoil-proof LED with Total Internal Reflection lens for extended reach and useful peripheral light
• Rail-Lock system for fast attachment and removal on pistol or rifle Picatinny and Universal rails
• Mil-Spec hard-anodized aerospace aluminum body—durable and corrosion-resistant
• Sealed and submersible to 22 meters for durability in harsh conditions
• Ambidextrous integral switch: momentary or constant-on activation
• Approximately 1.5 hours runtime per battery set
• Compatible with optional grip switches and XT07 tape switch for alternative activation methods

Specifications

Frequently Asked Questions

Can the X300U-A be mounted on both rifles and pistols?

Yes. The Rail-Lock mounting system works with both pistol and rifle rails (Picatinny and Universal standards). You can quickly attach and detach the light between firearms without tools.

What batteries does it use, and how long do they last?

The X300U-A uses 2 CR123A batteries, which are included. You'll get approximately 1.5 hours of runtime per battery set at full output.

Is the X300U-A weatherproof?

Yes. The housing is sealed with O-rings and gaskets and is submersible to 22 meters, making it reliable in wet conditions, rain, and water crossings.

Can I use the X300U-A hands-free on a rifle?

The light includes an integral ambidextrous switch for one-handed activation. You can also purchase an optional XT07 tape switch to activate the light without changing your grip on the rifle.