Pistol / Picatinny Rail – Weapon Light – 1000 Lumens / 11,300 Candela – X300U-B Black
PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.
The SureFire X300U-B is the B-series Ultra model with the low-profile thumbscrew clamp for Universal and Picatinny rails. It throws 1,000 lumens with a broader Ultra beam pattern than the Turbo line and remains one of the most common duty and defensive pistol lights on the planet.
This is the B-series mount pattern, which matters for setup and holster fit. SureFire also uses the X300U-B as the holster reference for the X300T-B Turbo family.
Fitment
- Fits Universal and Picatinny accessory rails
- B-series thumbscrew clamp mount
- Common handgun and long-gun rail fitment
Does NOT fit
- Not the A-series Rail-Lock mount version
- Do not assume A-series holster interchange without verifying
What it does
The Ultra model balances a strong center hotspot with broader surrounding illumination for close- to medium-range defensive use.
Why it’s worth it
If the buyer wants the thumbscrew version of the classic X300 Ultra, this is it. No drama. No mystery. Just one of the most proven pistol lights ever built.
Specs
- Output: 1,000 lumens
- Peak beam intensity: 11,300 candela
- Runtime: 1.25 hours
- Beam distance: 213 meters
- Batteries: 2x CR123A included
- Switching: Ambidextrous push / toggle
- Mount: B-series thumbscrew
- Finish: Black hard anodized
- Water resistance: IPX7
What’s included
- SureFire X300U-B weapon light
- Two CR123A batteries
Verify before you buy
Verify Universal or Picatinny rail fit and verify the buyer wants the B-series thumbscrew clamp rather than the A-series Rail-Lock setup.
⚠ Trademark & Compatibility Disclaimer
IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by any manufacturer mentioned. All trademarks are the property of their respective owners and are used only to identify compatibility or fitment.
