The SureFire X300U-B is the go-to rail-mounted light for professionals needing instant target identification in the dark. Unlike cheaper lights that fail or shift under recoil, the X300U-B features a rock-solid T-slot thumbscrew mount and a shock-isolated LED designed to withstand thousands of rounds without losing electrical connection.
Performance built for both efficiency and durability, this light uses a custom Total Internal Reflection (TIR) lens. Instead of just scattering light, it creates a powerful central hotspot for long-distance aiming while still providing enough peripheral spill to maintain situational awareness. This setup punches through tinted glass and dust far better than standard reflectors.
Whether mounted on a duty pistol or a long gun, the aerospace aluminum housing is built to take abuse. Delivering 1,000 lumens and 11,300 candela out to 213 meters, it allows you to identify threats instantly while the intuitive ambidextrous switching ensures you stay in control during close-range engagements.
Features:
- Total Internal Reflection lens + optical beam collimation = higher candela concentration for photonic barrier penetration
- T-slot thumbscrew rail clamp + metal-to-metal interface = reduced mount shift under recoil cycles
- Aerospace aluminum body + hard-anodized coating = resistance to impact, abrasion, and heat from extended firing
- Ambidextrous push/toggle switching + momentary activation design = controlled light discipline without altering firing grip
Technical Specifications
- Product Name: SureFire X300 Ultra (X300U-B)
- SKU: X300U-B
- Output: 1,000 Lumens
- Peak Beam Intensity: 11,300 Candela
- Runtime: 1.25 Hours
- Beam Distance: 213 Meters
- Body Material: High-strength Aerospace Aluminum
- Finish: Mil-Spec Hard Anodized
- Waterproofing: IPX7 (1 meter for 30 minutes)
- Weight (with batteries): 4.1 oz (116 g)
- Length: 3.76 in (9.55 cm)
- Bezel Diameter: 1.125 in (2.9 cm)
- Battery Type: Two (2) 123A Lithium (Included)
- Switching: Ambidextrous push/toggle
- Mount Type: T-slot thumbscrew rail clamp
- Lens Type: Total Internal Reflection (TIR)
- Platform Compatibility: Picatinny and universal handgun rails
- Made in the USA
Professionals depend on the X300U-B because its engineering prioritizes durability, beam control, and secure weapon mounting. When equipment reliability matters most, trust SMKW to deliver genuine SureFire illumination tools backed by industry expertise.
