The SureFire X300U-B is a high-output pistol light constructed from hard-anodized aluminum in a tan finish. This model produces 1,000 lumens of white light through a precision Total Internal Reflection (TIR) lens, generating a concentrated central beam with surrounding spill for target identification in low-light conditions. The LED emitter is regulated for consistent output and has no filament to fail under recoil.

The “B” model Rail-Lock system uses a screw-tightened clamp for secure mounting to both universal and Picatinny rails. Ambidextrous rear switches allow momentary or constant-on activation, and optional SureFire DG or XT remote switches can be added for specialized applications. The housing is gasket sealed for weather resistance and powered by two CR123A batteries. No original packaging included.

Specifications:

• Manufacturer: SureFire

• Model: X300U-B

• Finish/Color: Tan, hard anodized

• Output: 1,000 lumens

• Lens: TIR (Total Internal Reflection)

• Emitter Type: LED

• Activation: Ambidextrous toggle, momentary or constant-on

• Mount Type: Rail-Lock (screw-tightened), fits most universal and Picatinny rails

• Power Source: 2x CR123A batteries

• Material: Aluminum

• Water Resistance: Weather-sealed

• Length: 3.6 in

• Weight: ~4.0 oz with batteries