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SureFire X300U-B WeaponLight

SureFire X300U-B WeaponLight

Manufacturer: SureFire
Category: Weapon Lights & Flashlights
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High Output 1,000 lumens
High Runtime 1.25 hours
Batteries Two 123A lithium (incl.)
Switching Ambidextrous push/toggle

Defense Systems Full Specifications

1. General Information

Name	SureFire X300U-B WeaponLight
Manufacturer	SureFire
Country of Origin	United States
Type / Role	Handgun / Long Gun Weapon-Mounted Light
Introduced / Service Entry	Mid-2010s (current generation)
Status	Active / In Production
Unit Cost	$379–$399

2. Performance

Maximum Output (Recharge)	N/A (Primary CR123A)
Maximum Output (Lithium)	1,000 lumens
Peak Beam Intensity	11,300 candela
Operational Range (Throw)	213 meters
Endurance (SF18650B)	N/A
Endurance (2x CR123A)	1.25 hours
Photonic Barrier Pen	High (effective for close-medium tactical use)

3. Dimensions

Length	3.76 in (9.55 cm)
Bezel Diameter	1.125 in (2.9 cm)
Height	~1.3 in (approx., rail mounted)
Maximum Operational Weight	4.1 oz (116 g) with batteries

4. Payload & Armament

Illumination Type	High-Performance White LED
Mounting Footprint	Universal & Picatinny Rails
Rail Hardware Included	T-slot thumbscrew clamp
Primary Lens	Precision TIR Lens
Switches Supported	Ambidextrous / Optional remote (DG/XT)

5. Propulsion (Power Subsystem)

Primary Source	2x CR123A Lithium Batteries
Secondary Source (Dual)	N/A
Thermal Regulation	Yes (integrated)

6. Communication & Control (Activation)

Control Type	Momentary / Constant-On
Circuit Protection	Integrated
Ingress Protection Rating	IPX7 (1m / 30 min)

7. Operational Use

Primary Users	U.S. Law Enforcement, Military, Tactical Operators
Combat Proven	Yes
Notable Deployment	Widespread adoption by federal, state, and local agencies

PROS

Exceptional 1,000-lumen output with effective 213m throw for threat identification
Extremely durable aerospace aluminum construction with Mil-Spec finish
Secure T-slot thumbscrew mounting system for reliable rail lockup
Ambidextrous switching for intuitive one-finger operation
IPX7 waterproof rating and proven performance in law enforcement/military use

CONS

Higher price point compared to consumer-grade weapon lights
Runtime of 1.25 hours may require battery management in prolonged operations
Fixed high-output mode only (no variable brightness settings)
Battery cost over time with CR123A cells
Slightly heavier than some compact alternatives when mounted on subcompacts

SureFire X300U-B WeaponLight: 1000 Lumen Tactical Illumination

The SureFire X300U-B stands as one of the most widely adopted weapon-mounted lights in the U.S. defense and law enforcement communities. Designed for handguns but versatile enough for long guns, this ultra-high-output LED WeaponLight delivers powerful illumination in high-stakes tactical environments where positive threat identification is critical.

Manufacturer

SureFire, a U.S.-based company headquartered in California, has long been a leader in tactical lighting solutions. The X300U-B continues SureFire’s tradition of producing Mil-Spec durable equipment for demanding operational use.

Overview and Capabilities

The X300U-B produces 1,000 lumens of bright white light, focused through a precision Total Internal Reflection (TIR) lens. This creates a balanced beam with a strong central hotspot for distance and ample spill for peripheral awareness, making it effective for close- to medium-range engagements. Peak beam intensity reaches 11,300 candela, providing a functional throw of approximately 213 meters.

It attaches securely via a T-slot thumbscrew clamp to both Universal and Picatinny rails, ensuring a solid lockup on a wide variety of handguns. Ambidextrous momentary and constant-on switching allows instant activation without altering the shooter’s grip. Optional remote switches (DG and XT series) are available for long-gun configurations. The light is constructed from high-strength aerospace aluminum with a Mil-Spec hard anodized finish, offering excellent resistance to corrosion and impact. It is IPX7 waterproof to 1 meter for 30 minutes.

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Performance and Runtime

Powered by two CR123A lithium batteries (included), the X300U-B delivers 1.25 hours of runtime at full output. Its robust thermal regulation and efficient LED maintain performance under sustained use.

Cost/Price

Retail pricing typically ranges from $379 to $399, reflecting its premium build quality and proven reliability in professional applications.

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