Est. 2014 | USA Small Business

SureFire X300U-B | Pistol & Rifle Light w/ 1,000 Lumens & 11,300 Candela
FREE Delivery & Lifetime Warranty
☑️ Ships for FREE from Texas*
Ships today or next day on most orders that are "In Stock". Some orders that are custom or large may take extra time to prepare.
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- If there are delays: (Only if delays are in green, above, do we expect them), just know that we are on your side. If you're waiting, we're waiting for you, plus hundreds and sometimes thousands of others to finish being made.
- Shipping times are estimations. Items that are custom, delayed, rejected, or affected by other acts of god will take additional time.
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Address: 2491 Alluvial Ave. Clovis, CA 93611
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Return & Exchange policy:
- Summary: Don't take those sweet Instagram pics and then try to return a used item. Must be within 30 days of delivery.
- Exchanges: Realized you need a different item? That's ok! Exchanges and returns are incredibly easy.
- We are a Small Business: We do the most we can to help with return costs, but we are not Amazon and cannot take hits or losses like Amazon.
- Wrong Items: Mistakes rarely happen. Atomic Defense takes pictures of orders before they are packaged and shipped. We pay for return, recertification, and exchange shipping costs if we ever make a mistake on your orders.
- Rules for Returns: We will deduct refurbishing costs, plus materials and labor, of used products or modified products - or decline the return. This includes, but is not limited to; products with residue, smells, scratches, missing parts, debris, dents and damage. **We reserve the right to refuse returns. Refused returns shipping cost back to the buyer are not covered by Atomic Defense.
- Packaging: Ensure returns are packaged safely with thick padding on all six sides. Failure to correctly package returns may damage products and cost will be deducted from Buyer's account or return refused.
- Bulletproof products: No one else accepts returns on ballistic items. We do.** However, recertification X-Ray costs on returned ballistic items is 20%.
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SureFire X300U-B | Secure Your Advantage Today! Delivers unmatched reliability when it matters the most
- The SureFire X300U-B weapon light delivers 1,000 lumens of blinding white light, giving you a clear view in low-light situations. This light stands out with its quick-detach rail clamp, making it fast and easy to attach or remove, so you're always ready.
- 1,000 Lumens of LED Light: This powerful beam cuts through darkness, helping you see targets clearly and disorienting threats, giving you a critical advantage in high-stakes environments.
- Quick-Detach Rail Clamp: Mount or remove the SureFire X300 U B from your pistol or long gun in seconds without tools. This means faster transitions and more flexibility in the field.
- Aircraft-Grade Aluminum Body: Made from tough aluminum with a Mil-Spec anodized finish, this light is built to handle rough use and extreme conditions, ensuring it works when you need it most.
- Waterproof (IPX7 Rated): Tested to work in wet conditions, this light keeps performing even when submerged in water, making it reliable in any weather.
SureFire X300U-B Review
SureFire X300U-B Features & Specifications
The SureFire X300 UB weapon light is essential for anyone operating in low-light conditions because it provides a powerful 1,000-lumen beam to clearly identify threats and maintain situational awareness. Its quick-detach rail clamp allows for rapid attachment and removal, giving you critical flexibility in dynamic situations. This makes it a standout choice for military, law enforcement, and security professionals who rely on their gear to perform flawlessly when lives are on the line.
X300U-B Key Features
- 1,000 Lumens of LED Light: Delivers a blinding white light to cut through darkness, helping you see targets clearly and disorienting threats.
- Quick-Detach Rail Clamp: Mounts or removes from your firearm in seconds without needing tools, ensuring faster transitions and greater adaptability.
- Aircraft-Grade Aluminum Body: Made from tough aluminum with a Mil-Spec anodized finish, ensuring it handles rough use and extreme conditions.
- Waterproof (IPX7 Rated): Continues to perform even when submerged in water, providing reliability in any weather.
X300U-B Specifications
- Light Output: 1,000 lumens
- Material: Aircraft-grade aluminum with Mil-Spec anodized finish
- Mounting: Quick-detach rail clamp
- Waterproof Rating: IPX7
What's in the box of the SureFire X300UB?
- (1) SureFire X300 Ultra B
- (1) Battery Cover
- (1) Battery Cover Retaining Pin
- (2) 123A Batteries
- (1) Picatinny Crossmember
SureFire X300U B FAQs
What firearms can the SureFire X300U-B be mounted on?
The SureFire X300 B Ultra is designed to mount on most handguns and long guns with Universal or Picatinny (MIL-STD-1913) rails. Its quick-detach clamp system makes it versatile for various firearms.
How bright is the SureFire X300U-B, and what does that mean for me?
The SureFire X300B produces 1,000 lumens of light. This powerful output means you'll have a clear, bright view of your surroundings in dark environments, helping you identify threats and maintain situational awareness effectively.
Is the SureFire X300U-B durable enough for real-world use?
Yes, it is. The SureFire X300-B is made from tough aircraft-grade aluminum with a Mil-Spec anodized finish, built to withstand harsh conditions and rough handling. It's also waterproof, so it will keep working even in wet environments.
How do I attach and detach the X300U-B from my firearm?
The Surefire X300U B Ultra features a quick-detach rail clamp. This allows you to attach or remove the light from your firearm in seconds without needing any tools, providing quick adaptability in the field.
What kind of batteries does the SureFire X300U-B use, and how long do they last?
The X300U-B uses two 123A lithium batteries. While exact runtimes can vary based on usage, these batteries provide reliable power for consistent performance when you need it.
Where can I purchase the SureFire X300U-B?
When you're ready to buy the SureFire X300U-B, choose Atomic Defense. We're not just selling lights; we're helping you get the best stuff. Go to our website today to buy yours and see how easy it is with Atomic Defense.
SureFire X300 A vs B
Choosing between the SureFire X300U A vs X300U B primarily comes down to their mounting systems and slight differences in specifications. While both deliver reliable performance, understanding their distinctions will help you pick the best fit for your tactical needs.
- Mounting System: The X300U-A features a lever-latch mount. This system allows for quick and easy attachment and detachment to your weapon's rail without tools. In contrast, the X300U-B utilizes a T-slot thumbscrew clamp for a rock-solid, secure fit. Both are effective, but the 'A' model prioritizes rapid on/off, while the 'B' model offers a slightly more permanent and rigid attachment.
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Output and Distance (X300U-A): The X300U-A delivers 650 lumens of output with a peak beam intensity of 11,300 candela, reaching a distance of 213 meters.
- Output and Distance (X300U-B): The X300U-B boasts a higher output of 1,000 lumens and a much greater peak beam intensity of 66,000 candela, allowing it to reach an impressive distance of 514 meters. This makes the X300U-B ideal for longer-range illumination and target identification.
- Runtime: The X300U-A has a runtime of 1.5 hours , while the X300U-B has a slightly shorter runtime of 1.25 hours.
- Weight and Length: Both models are similar in weight and length, with the X300U-A weighing 4.0 oz (113 g) and measuring 3.76 in (9.55 cm).
When deciding between the SureFire X300U A vs B, consider whether your priority is rapid mounting (X300U-A) or maximum light output and throw (X300U-B).