The SureFire X300U is a popular weapon light among gun enthusiasts and professionals. It comes in two main versions: the X300U-A and X300U-B. These models have some key differences that can affect their performance and usability.
The main difference between the X300U-A and X300U-B lies in their mounting systems. The A model uses a quick-attach lever system, making it easy to attach and remove. The B model has a thumbscrew mount that provides a more secure fit but takes longer to install.
Both versions offer powerful illumination and durability. The choice between them often comes down to personal preference and the specific firearm they’ll be used with. Some users prefer the A model for its quick attachment, while others opt for the B model’s rock-solid mounting.
Key Takeaways
- The X300U-A has a quick-attach system, while the X300U-B uses a thumbscrew mount
- Both models provide bright illumination and are built to withstand harsh conditions
- The choice between A and B depends on the user’s needs for quick removal versus extra stability
Overview of the Surefire X300U
The Surefire X300U is a popular weapon-mounted light known for its durability and brightness. It has evolved over time to meet the needs of both military and law enforcement personnel.
History and Evolution
Surefire introduced the X300U as an upgrade to their earlier X200 model. The original X300 produced 175 lumens, which was impressive at the time. As technology improved, Surefire increased the light output.
The X300U now offers 600 lumens in its latest versions. This boost in brightness has made it a top choice for professionals and civilians alike.
Surefire has made changes to the design over the years. The newer models have a shorter, stubbier paddle switch compared to the earlier versions.
Design Philosophy
Surefire built the X300U with reliability and performance in mind. The light is made from high-quality materials to withstand harsh conditions.
The X300U comes in two main versions: the X300U-A and X300U-B. The A model uses a quick-attach system, while the B model has a more secure mounting option.
Both versions feature ambidextrous switches for easy operation. The light’s beam is designed to provide a good balance of throw and flood, suitable for various situations.
Applications and Use Cases
The Surefire X300U is widely used by military and law enforcement personnel. Its bright output helps in target identification and threat assessment in low-light conditions.
Many civilians also choose the X300U for home defense. The light’s power can disorient potential intruders, giving users an advantage.
Competition shooters often use the X300U in night matches. Its reliability and performance make it a trusted tool in high-stress situations.
The light can be mounted on both handguns and long guns. This versatility makes it a popular choice for those who want a single light for multiple firearms.
Comparing X300U-A and X300U-B
The SureFire X300U-A and X300U-B are popular weapon lights with key differences. These variations affect mounting, compatibility, and performance.
Mounting Interface Differences
The X300U-A uses a rail-lock mounting system with a lever. This system works well for polymer-framed pistols. It attaches securely but can be quickly removed.
The X300U-B has a T-slot mounting system. This design uses a screw to tighten the light onto the rail. It provides a more solid connection, especially for metal-framed guns.
The B model is often preferred for duty use due to its stronger attachment. However, the A model is easier to switch between different firearms.
Physical Dimensions and Compatibility
Both models have similar overall dimensions. They are designed to fit most full-size and compact pistols.
The X300U-A may require different mounting plates for various gun models. For example, it needs a P plate for Gen 5 Glocks and a U plate for Gen 4s.
The X300U-B is more universal in fit. Its T-slot design adapts to different rail systems without needing extra parts.
Both lights extend beyond the muzzle on most pistols. This can affect holster compatibility.
Output and Performance
Both the X300U-A and X300U-B offer identical light output. They produce 1,000 lumens with 11,300 candela.
The beam pattern is the same for both models. It provides a focused hotspot for target identification with some spill for peripheral vision.
Runtime is also identical at 1.25 hours on high output. This is sufficient for most tactical situations.
Both models use SureFire’s TIR lens for a balanced beam. This helps with both close-quarters use and longer-range illumination.
Battery Life and Power Source
The X300U-A and X300U-B use the same power source. They run on two CR123A lithium batteries.
Battery life is identical for both models. Users can expect about 1.25 hours of runtime at full output.
Both lights have low-battery indicators. The LED will flash when battery power is low.
Changing batteries is straightforward in both models. The battery door design allows for quick swaps without removing the light from the weapon.
Technical Specifications
The SureFire X300U-A and X300U-B models have distinct technical features. These specs cover light output, build quality, and operation.
Light Intensity and Beam Pattern
The X300U-A and X300U-B both produce 1000 lumens of light output. This bright beam helps users identify targets in low-light conditions. The lights use LED technology for efficiency and longevity.
The beam pattern is wide and even. This spread illuminates a large area for better situational awareness. At the center, a focused hotspot allows for pinpoint accuracy.
Battery life varies by use. In continuous mode, the lights run for about 1.25 hours. Intermittent use extends battery life significantly.
Durability and Materials
SureFire builds these lights to withstand harsh conditions. Both models feature tough aluminum bodies. This material resists impacts and corrosion.
The lights are IPX7 waterproof rated. This means they can survive submersion in 1 meter of water for 30 minutes. A sealed design keeps out dust and debris.
Scratch-resistant tempered glass protects the LED. This lens maintains clarity even after heavy use. The anodized finish adds extra durability to the aluminum body.
Activation and Control Features
The X300U-A and X300U-B have slightly different controls. Both feature ambidextrous switches for easy operation.
Users can choose between momentary and constant-on modes. The momentary mode activates the light only while pressed. Constant-on keeps the light running until switched off.
The X300U-A uses a quick-detach system. Two pull-down tabs allow for fast removal. The X300U-B has a screw mount for a more secure fit on some weapons.
Both models include optional T-slot mounts. These adapt the lights to various rail systems.
Installation and Operation
The SureFire X300U models differ in how they attach to weapons and how users interact with them. These factors impact ease of use and performance.
Attaching and Detaching Methods
The X300UA uses a quick-detach system for fast mounting and removal. It comes with interchangeable rail inserts for different weapon rails. The “U” insert fits most rails, while the “P” insert works best with Picatinny rails.
The X300UB has a thumbscrew mount that locks down tightly. This eliminates wobble but takes longer to install and remove. The B model is ideal for users who want a very secure fit and don’t need to switch the light between weapons often.
User Interface and Handling
Both X300U versions have the same controls. Two rear switches allow for constant-on or momentary activation. These ambidextrous switches make the light easy to use with either hand.
The A model’s quicker attachment system makes it better for users who frequently remove the light. The B model’s tighter fit can improve weapon handling for those who leave the light mounted permanently.
Accessories and Compatibility
The SureFire X300U-A and X300U-B models have different mounting systems. This affects their compatibility with holsters and rail systems. Let’s look at the specific accessories and equipment that work with each version.
Holsters and Support Equipment
The X300U-A and X300U-B require different holsters due to their unique mounting mechanisms. X300U-A holsters typically have a tighter fit. They’re designed for the light’s universal rail-lock mounting system.
X300U-B holsters are more versatile. They accommodate the T-slot mounting system. This allows for a wider range of weapon fits.
Both lights work with SureFire’s tape switches and pressure pads. These accessories enhance the light’s usability in tactical situations.
Compatible Rail Systems
The X300U-A uses a rail-lock system. It fits most standard pistol rails and some rifle rails. This version is popular for its ease of attachment and removal.
The X300U-B features a T-slot mounting system. It’s compatible with a broader range of weapons. This includes pistols, rifles, and submachine guns with Picatinny or universal rails.
For optimal fit, SureFire provides different mounting plates. Users should check their weapon’s rail type before choosing between the A and B models.
Both versions work well on polymer-framed pistols. However, the B model may offer a more secure fit on some gun models.
Maintenance and Care
Proper maintenance keeps your SureFire X300U working well. Regular cleaning and quick fixes help the light stay bright and reliable.
Cleaning Procedures
Clean your X300U after each use. Remove the light from your weapon first. Use a soft cloth to wipe down the body. For stubborn dirt, use a damp cloth with mild soap.
Don’t submerge the light in water. Clean the lens with a microfiber cloth. Be gentle to avoid scratches. Use a cotton swab to clean hard-to-reach spots.
Check the battery contacts. Clean them with rubbing alcohol if needed. Make sure everything is dry before reassembling.
Troubleshooting Common Issues
Dim light often means weak batteries. Replace them with fresh ones. If that doesn’t work, check the contacts for corrosion.
Flickering lights can be fixed by tightening connections. Make sure the tailcap is screwed on tight. Check that the battery is seated correctly.
If the light won’t turn on, try these steps:
- Replace batteries
- Clean all contacts
- Check for damage to the switch
For mounting issues, ensure you’re using the right model. The X300U-A and X300U-B have different mounts. Adjust as needed for a secure fit.
User Reviews and Testimonials
Many gun owners have shared their experiences with the Surefire X300U-A and X300U-B models. Reviews often highlight the brightness and durability of both versions.
X300U-A users praise its quick-attach system. They like how easy it is to put on and take off. Some say it works great on polymer-framed pistols.
X300U-B fans appreciate its secure attachment. They report less wobble when mounted. This makes it popular for metal-framed guns.
Both versions get high marks for their powerful 1,000-lumen output. Users say it’s bright enough for home defense and law enforcement use.
Some reviewers note the X300U-B can be harder to remove quickly. Others mention the X300U-A might need adjusting on some gun models.
A few users report preferring the newer paddle design on recent X300U-A models. They find it more comfortable to operate.
Overall, most reviewers agree both versions offer excellent performance. The choice often comes down to personal preference and specific gun compatibility.
Purchasing Options and Warranty
SureFire X300U lights are available from many retailers. Popular options include Brownells and Big Tex Ordnance.
Both the X300U-A and X300U-B models come with SureFire’s limited lifetime warranty. This covers defects in materials and workmanship for the original owner.
Buyers should check the serial number when purchasing. Numbers starting with “A” indicate older, lower lumen models. “B” serial numbers denote newer 1000 lumen versions.
Prices may vary between retailers. It’s wise to compare options from different sellers. Some stores offer package deals or discounts on accessories.
Used X300U lights can sometimes be found at lower prices. However, the warranty may not transfer to second-hand buyers.
SureFire occasionally releases updated versions of the X300U. Checking for the latest model ensures getting the most current features and improvements.
Frequently Asked Questions
The Surefire X300U models have some key differences in mounting, features, and performance. Users often have questions about attachment, beam characteristics, battery life, and compatibility between versions.
Which features distinguish the Surefire X300U-A from the X300U-B?
The main difference is the mounting system. The X300U-A uses a rail-lock system for quick attachment and removal. The X300U-B has a tighter-fitting mount with a thumbscrew for a more secure fit.
The X300U-B eliminates wobble but takes longer to install and remove. Both models provide 1,000 lumens of light output.
Can the Surefire X300 be securely attached to a Glock with the X300U-A or B version?
Both versions can attach to Glocks, but with different levels of security. The X300U-A may require adapter plates for some Glock models to ensure a snug fit.
The X300U-B generally provides a tighter, more secure fit on Glocks without needing additional plates. Its thumbscrew mount allows for a custom-tightened fit.
What are the beam differences between Surefire X300U and X300 Turbo models?
The X300U models have a wider beam for close-range illumination. The X300 Turbo has a more focused beam for longer-range use.
The Turbo provides a tighter hotspot and more throw, while the standard X300U offers broader flood lighting. Beam intensity and distance are greater on the Turbo version.
How does the battery life compare between the Surefire X300U models?
Battery life is similar across X300U models. They typically provide 1-1.5 hours of continuous runtime on high output.
Actual battery life may vary based on usage patterns and environmental conditions. Using quality batteries and proper maintenance helps maximize runtime.
Is it possible to interchange the mounting systems on the X300U-A and X300U-B?
The mounting systems are not designed to be interchangeable between A and B models. Each version has a specific mounting interface.
Attempting to swap mounts could damage the light or affect its performance. Users should choose the model with their preferred mounting system.
What are the considerations when looking for a used Surefire X300U-B?
Check for signs of wear on the body and lens. Ensure the thumbscrew mount functions smoothly and securely.
Test the light output and switches to verify proper operation. Confirm the model is genuine, as counterfeits exist. Consider the age and potential battery drain.