If you're looking to enhance your Glock 21, adding a laser sight can be one of the best upgrades. Not only does it improve accuracy, but it also allows for quicker target acquisition, which can be critical in both self-defense and tactical situations.

In this comprehensive guide, I will review some of the best laser sights for the Glock 21, providing detailed insights into their specifications, features, pros and cons, and user experiences. I'll also cover how to choose the best laser sight and answer some frequently asked questions.

Top 7 Best Laser Sights for Glock 21 on the Market

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SureFire X400U-A⁠

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Streamlight TLR-2 HL G⁠

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Crimson Trace CMR-204⁠

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OLIGHT Baldr Pro⁠

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Viridian X5L Gen 3⁠

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ArmaLaser TR9⁠

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Tacticon Firefly V2⁠

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Note: The following advice comes from my personal perspective. What works for me might not work for you, but hopefully it sparks some ideas!

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SureFire X400U-A - Laser Light Combo

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Specifications

Laser Type: Red (635 nm)

Lumens: 1000 lumens (white light)

Battery: Two CR123A batteries

Weight: 4.9 ounces

Material: Aerospace aluminum

Best Features

The SureFire X400U-A combines a powerful white light with a high-visibility red laser. This dual-functionality makes it ideal for both illumination and precise aiming. The laser is located below the flashlight, allowing for easy zeroing and consistent point of impact.

Pros

Extremely bright light at 1000 lumens

Durable and rugged construction

Easy to attach and detach

Reliable performance

Cons

Higher price point

Bulkier compared to some other models

Experience

Using the SureFire X400U-A on my Glock 21 has been a game-changer. The brightness of the light is unparalleled, providing excellent illumination even in complete darkness. The red laser is crisp and maintains accuracy well. However, the bulkiness may be a downside for those looking for a more compact solution.

Online Comments

Many users praise the SureFire X400U-A for its robust build and reliability. Some have mentioned that the price is steep but justified by the performance and durability.

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Streamlight TLR-2 HL G - Laser Light Combo

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Specifications

Laser Type: Green (520 nm)

Lumens: 1000 lumens (white light)

Battery: Two CR123A batteries

Weight: 4.78 ounces

Material: 6000 series machined aircraft aluminum

Best Features

The Streamlight TLR-2 HL G features a high-power green laser that is more visible in daylight compared to red lasers. The white light offers 1000 lumens of brightness, and the ambidextrous on/off switch makes it user-friendly for both left and right-handed shooters.

Pros

Bright green laser visible in daylight

Powerful white light

Durable construction

Easy to operate

Cons

Slightly heavy

Higher cost

Experience

I've found the Streamlight TLR-2 HL G to be highly effective in various lighting conditions. The green laser stands out exceptionally well during the day, and the white light is powerful enough for any low-light scenario. The weight is noticeable but not cumbersome.

Online Comments

Users generally appreciate the TLR-2 HL G's combination of brightness and laser visibility. Some have noted that it’s slightly heavy but worth it for the performance it delivers.

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Crimson Trace CMR-204 - Laser Light Combo

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Specifications

Laser Type: Green (515 nm)

Lumens: 100 lumens (white light)

Battery: One CR2 battery

Weight: 2.2 ounces

Material: Polymer and aluminum

Best Features

The Crimson Trace CMR-204 is designed to be lightweight and compact while offering a powerful green laser and an adequate white light. Its Instinctive Activation feature ensures the laser activates when you grip your firearm.

Pros

Lightweight and compact

Instinctive Activation

Green laser is very visible

Affordable

Cons

Light is not as powerful as others

Battery life could be better

Experience

The Crimson Trace CMR-204 has been a reliable addition to my Glock 21. The lightweight design doesn’t add much bulk, and the Instinctive Activation is a fantastic feature, making it quick to deploy. The light isn’t the brightest, but it’s sufficient for most purposes.

Online Comments

Users frequently commend the CMR-204 for its ease of use and lightweight design. Some wish the light output was higher but appreciate the laser’s visibility and the overall value for the price.

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OLIGHT Baldr Pro - Laser Light Combo

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Specifications

Laser Type: Green

Lumens: 1350 lumens (white light)

Battery: Two CR123A batteries

Weight: 4.55 ounces

Material: Aluminum alloy

Best Features

The OLIGHT Baldr Pro stands out with its 1350 lumens of blinding light and a highly visible green laser. The adjustable rail ensures it fits various firearms, and the quick detach/attach system makes it convenient to use.

Pros

Extremely bright light

High visibility green laser

Adjustable rail

Quick detach/attach

Cons

Larger size

Battery consumption is high

Experience

The OLIGHT Baldr Pro’s brightness is unmatched, making it ideal for both tactical and home defense situations. The green laser is sharp and easy to see, even in bright conditions. Its larger size might be a concern for some, but the benefits far outweigh this minor inconvenience.

Online Comments

Many users highlight the Baldr Pro’s powerful light and laser combo. Some mention the high battery consumption but find it a fair trade-off for the performance delivered.

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Viridian X5L Gen 3 - Laser Light Combo

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Specifications

Laser Type: Green (510-520 nm)

Lumens: 500 lumens (white light)

Battery: One CR123A battery

Weight: 3.3 ounces

Material: Polymer and aluminum

Best Features

The Viridian X5L Gen 3 combines a green laser with a moderately powerful white light. Its Enhanced Combat Readiness (ECR) technology activates the laser automatically when drawn from a compatible holster, making it incredibly user-friendly.

Pros

ECR technology

Green laser visible in daylight

Lightweight

Easy to install

Cons

Light could be brighter

Battery life is moderate

Experience

Using the Viridian X5L Gen 3 has been convenient and effective. The ECR technology is a significant advantage, ensuring the laser is ready when you need it. The light is sufficient for most scenarios, and the overall lightweight design doesn’t affect handling.

Online Comments

Users appreciate the ECR feature and the laser’s visibility. Some wish the light was brighter, but overall, it receives high marks for its innovative features and ease of use.

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ArmaLaser TR9

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Specifications

Laser Type: Red

Lumens: N/A

Battery: One CR1/3N battery

Weight: 1.2 ounces

Material: DuPont Zytel polymer

Best Features

The ArmaLaser TR9 features a red laser and uses grip activation, meaning it activates when you grip the firearm naturally. It’s designed specifically for various Glock models, ensuring a perfect fit.

Pros

Grip activation

Lightweight and compact

Affordable

Easy to install

Cons

No white light

Red laser less visible in daylight

Experience

The ArmaLaser TR9 is incredibly lightweight and doesn’t add any bulk to my Glock 21. The grip activation is intuitive and ensures the laser is always ready. While it lacks a white light, the red laser is sufficient for most low-light situations.

Online Comments

Users like the TR9 for its simplicity and reliability. Some note the absence of a white light as a drawback but find the grip activation feature very beneficial.

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Tacticon Firefly V2 - Laser Light Combo

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Specifications

Laser Type: Green

Lumens: N/A

Battery: One CR2 battery

Weight: 1.5 ounces

Material: Aircraft-grade aluminum

Best Features

The Tacticon Firefly V2 offers a green laser in a compact and durable package. It’s designed to fit most firearms with a rail system and provides excellent visibility and accuracy.

Pros

Affordable

Durable build

Highly visible green laser

Compact

Cons

No white light

Battery life could be better

Experience

The Tacticon Firefly V2 is a budget-friendly option that doesn’t compromise on quality. The green laser is bright and easily visible, and its compact design keeps my Glock 21 streamlined. The lack of a white light is a limitation, but for the price, it’s a solid choice.

Online Comments

Many users recommend the Firefly V2 for its affordability and performance. Some wish it included a white light but are generally satisfied with the laser’s visibility and the overall value.

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How to Choose the Best Laser Sight for Glock 21

Laser Color

Green lasers are more visible in daylight, while red lasers are typically less expensive and perform well in low-light conditions.

Light Output

Consider if you need a model with an integrated flashlight. Higher lumen outputs provide better illumination but can consume more battery.

Activation Method

Look for laser sights with activation methods that suit your shooting style, such as grip activation, switch activation, or automatic activation.

Size and Weight

Ensure the laser sight doesn’t add too much bulk or weight to your firearm, which can affect handling and holstering.

Battery Life

Check the battery life of the laser sight, especially if you plan to use it frequently. Some models offer longer battery life than others.

Durability

Opt for laser sights made from robust materials like aluminum or high-quality polymers. This ensures they can withstand the rigors of use.

Price

Determine your budget and find a laser sight that offers the best value for your money. Sometimes, paying a bit more upfront can save you from frequent replacements.

FAQs

Can I install a laser sight on my Glock 21 myself?

Yes, most laser sights are designed for easy installation and can be mounted on your Glock 21 without professional help. Always refer to the manufacturer’s instructions for proper installation.

Are green lasers better than red lasers?

Green lasers are generally more visible in daylight and can offer better performance in various lighting conditions. However, red lasers are typically more affordable and work well in low-light environments.

Do laser sights improve shooting accuracy?

Laser sights can significantly improve shooting accuracy, especially for quick target acquisition and aiming in low-light conditions. They are beneficial for both beginners and experienced shooters.

How do I maintain my laser sight?

Regularly clean the laser lens and check the batteries to ensure optimal performance. Follow the manufacturer’s maintenance guidelines for specific instructions.

Are there legal restrictions on using laser sights?

Laser sight regulations can vary by location. It’s important to check local laws and regulations regarding the use of laser sights on firearms.

Can I use a laser sight with other firearm accessories?

Yes, laser sights can typically be used alongside other accessories like flashlights, suppressors, and optics, as long as they don’t interfere with each other’s mounting systems.

Conclusion

In conclusion, choosing the best laser sight for your Glock 21 involves considering your specific needs and preferences. Whether you prioritize laser visibility, light output, or ease of use, the products reviewed here offer excellent options. By understanding the features and benefits of each laser sight, you can make an informed decision and enhance your Glock 21’s performance.

Top 7 Best Laser Sights for Glock 21 on the Market

SureFire X400U-A - Laser Light Combo

Streamlight TLR-2 HL G - Laser Light Combo

Crimson Trace CMR-204 - Laser Light Combo

OLIGHT Baldr Pro - Laser Light Combo

Viridian X5L Gen 3 - Laser Light Combo

ArmaLaser TR9

Tacticon Firefly V2 - Laser Light Combo

How to Choose the Best Laser Sight for Glock 21

FAQs

Conclusion

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