5 Best Pistol Red Dot Sights for the Glock 20

Chris G.

I’m a big fan of firearms, and my favorite is the extremely reliable Glock 20. After testing numerous red dot sights on the range, I’ve found the top choices for this powerful handgun.

Whether you’re a seasoned shooter or a newbie, I’m excited to share these findings with you. Let’s explore the world of Glock 20 red dot sights together and find the perfect one to improve your shooting experience while staying within your budget.

Top 5 Best Red Dot Sights for the Glock 20 Pistol

Let’s discuss some of the top red dot sights for your Glock 20. Whether you’re looking for durability, exceptional accuracy, or a wide lens for improved visibility, I have some excellent options for you you to consider.

1. Holosun 507K X2: Most Recommended Choice

As a Glock 20 user, I highly recommend the Holosun 507K X2 as my top choice for a reliable and versatile red dot sight. And I don’t say this casually. This sight is specifically designed for subcompact pistols like the Glock 20 and offers a range of features that make it stand out.

One key feature is the optics’ lock mode, which prevents any accidental changes to the settings. I can trust the sight to perform consistently without any unexpected adjustments even in a tactical course at the range.

The Holosun 507K X2 utilizes Shake Awake technology, which helps conserve battery life. It shuts off after a prolonged period of inactivity but automatically activates when movement is detected. The Holosun 507K X2 offers a multi-reticle system powered by a Super LED, allowing me to choose between a 2 MOA dot and a 32 MOA circle. I can adapt the reticle to my specific shooting needs. The Holosun 507K X2’s battery life clocks in at an impressive 50,000 hours of battery life, so that the reticle burns bright most of the time.

The optic is parallax-free and has unlimited eye relief, providing a clear, comfortable, and encompassing sight picture. I never have to worry about any distortion or eye strain even during extended shooting sessions.

Durability is also a plus with this sight. The housing is constructed from strong 7075 Aluminum, which can withstand the rigorous demands of sport shooting. 

With its impressive features and reliable performance, the Holosun 507K X2 is a valuable addition to any Glock 20. Make sure to consider this top-notch red dot sight for your shooting needs.

Technical Specifications

Reticle: 2 MOA Dot and 32 MOA Circle
Light Wavelength: 650nm
Reticle Color: Red
Parallax Free: Yes
Unlimited Eye Relief: Yes
Magnification: 1x
Multi-Coatings: Yes
Power Source: Battery
Battery Type: CR1632
Battery Life: 50,000 hours
Brightness Setting: 10 daylight and 2 night vision compatible
Window Size: 0.58 x 0.77 inches
Dimension: 1.6 x 0.98 x 0.95 inches
Weight: 1 oz.
Housing Material: 7075 T6 Aluminum
Surface Finish: Anodized
Adjustment per Click: 1 MOA
Wind and Elevation Travel Range: ±30 MOA
Storage Temperature: -20℃~65℃
Working Temperature: -20℃~51℃
Submersion: IP67
Vibration: 5000G

2. Leupold DeltaPoint Pro: For Tough Situations

The Leupold DeltaPoint Pro is another excellent choice for the Glock 20. Thanks to its multi-coated lens, this high-quality optic offers exceptional light transmission and reduces glare. I can see targets clearly and, at the same time, I’m aware of the surroundings even in high-stress situations.

The aluminum housing and steel sheath boost the optics’ durability. The DeltaPoint Pro isn’t only fully waterproof, fogproof, and shockproof, but it also allows for easy battery replacement without removing the optic, guaranteeing optimal performance in tough conditions.

The DeltaPoint Pro features an illuminated reticle for both daylight and low-light conditions. Its Motion Sensor Technology extends battery life; it automatically switches off the red dot sight and turns it on once it detects movement.

Additionally, it’s proudly made in the USA and comes with Leupold’s renowned customer care.

Transitioning from iron sights to a red dot has never been smoother, making the DeltaPoint Pro a top pick for your Glock 20.

Technical Specifications

Battery Type: CR2032
Daylight Bright Illumination: Yes
Magnification Type: Fixed
Reticle Focal Plane: Second Focal Plane
Reticle: 2.5 MOA Dot
Reticle Type: Illuminated
Switch Type: Push Button
Weight: 2 oz
Elevation and Windage Adjustment Type: Coin Click
Elevation/Windage Adjustment Value per Click: 1 MOA
Elevation/Windage Adjustment Range: 60 MOA
Elevation/Windage Adjustment Range: 17 MIL
Elevation/Adjustment Range: 175 cm at 100 meters
Elevation Per Revolution: 40 MOA
Windage Adjustment Per Revolution: 15 MOA
Magnification Min: 1
Eye Relief Low Mag: Unlimited
Battery Life, Low Intensity: 1600 hours
Battery Life, Medium Intensity: 1000 hours
Battery Life, High Intensity: 300 hours
Number of Illum Settings: 8

3. Burris FastFire 3: For Unparalleled Speed and Ease of Use

The Burris FastFire 3 is a highly accurate red dot sight designed specifically for the Glock 20 pistol. It excels in precision, durability, and user-friendliness, making it a top choice for fast shooters and law enforcement agents.

The FastFire 3 has an easy-to-use power button, offering three levels of brightness and an automatic setting. This ensures optimal visibility, allowing shooters to maintain accuracy and performance in any lighting condition.

The FastFire 3 has a tool-less windage and elevation adjustments. These adjustments can be made quickly and easily on the field, allowing for precise sight alignment without the need for additional tools or complicated processes.

The top-of-sight battery access is another convenient feature of the FastFire 3. This design allows for hassle-free battery replacement, ensuring that shooters can stay on target without interruption or inconvenience.

Despite its impressive features, the FastFire 3 remains lightweight, adding minimal bulk to the Glock 20. This is particularly important for those who value maneuverability and ease of use.

Technical Specifications

Power Source: 1 x CR1632
Sight Window Dimensions: 0.8 x 0.6 inches
Magnification: 1x
Impact Point Correction: 1 MOA
Windage Adjustment: 86 MOA
Elevation Adjustment: 115 MOA
Operating Temperature: -10 to 130°F / -23 to 55°C
Water Resistance: Waterproof
Dimensions: 1.9 x 1.0 x 1.0 inches
Weight: 0.9 oz

4. Vortex Venom: Best Compact Red Dot Sight

Another favorite of mine is the Vortex Venom, a compact red dot sight designed for the Glock 20 pistol. Don’t let its look deceive you. This high-quality sight is lightweight and durable, allowing you to shoot in confidence in a high-action scenario. 

Like its bulkier and Its 3 MOA dot allows for quick target acquisition, making it perfect for various shooting scenarios. and provides a clear field of view with its fully multi-coated lenses. The controls for power and dot intensity are conveniently placed so I can adjust these on the fly. The Vortex Venom has an auto-brightness mode that automatically adjusts to different lighting conditions using an ambient light sensor.

Changing the battery is a breeze with the top load system, and the O-ring seals ensure protection against moisture and debris.

Parallax-free design, multi-coated aspherical lens, 1 MOA windage and elevation adjustments, and many more.—it’s easy to be accurate with this compact sight. 

Vortex Optics Venom Red Dot Sight – 3 MOA Dot
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Technical Specifications

Reticle: 3 MOA Dot
Reticle Color: Red
Power Source: 1 x CR1632
Runtime: 550 Hours
Mounting: Picatinny / Weaver
Magnification: 1x
Impact Point Correction: 1 MOA
Windage Adjustment: 130 MOA
Elevation Adjustment: 100 MOA
Water Resistance: Waterproof
Dimensions: 1.9 x 1.1 x 1.0 inches
Weight: 1.6 oz 

5. Vortex Razor: Wide Lens for Better Visibility

Finally, my collection of red dot optics includes the Vortex Razor is a reliable option for my Glock 20. The Vortex Razor has a wide multi-coated lens that enhances visibility and situational awareness. No detail escapes my peripherals while keeping the target on the dot. With its crisp and clear 3 MOA red dot, target acquisition becomes effortless.

The sensitive components of the Vortex Razor are housed in a sturdy and shockproof case made from thick high-quality aluminum. Its ArmorTek coating protects the casing and the exterior lenses from scratches, grease, and dirt. Easy battery access can be done through a snap-lock side door. Adjusting windage and elevation for zeroing is fast thanks to easy-to-use controls.

Technical Specifications

Magnification: 1x
Reticle: 3 MOA Dot
Adjustment Graduation: 1 MOA
Parallax Setting: Parallax Free
Max Windage Adjustment: 114 MOA
Max Elevation Adjustment: 170 MOA
Dot Color: Bright Red
Dot Size: 3 MOA
Mount Type: Picatinny
Eye Relief: Unlimited
Length: 1.83 inches
Weight: 1.3 oz

How to Choose the Best Red Dot for Glock 20

When it comes to selecting the right red dot sight for my Glock 20, there are several important factors to consider.

  1. Compatibility: The first thing I look at is whether the sight is compatible with my Glock model. I ensure the red dot sight I’m considering has a versatile mounting system suitable for my pistol.
  2. Reticle Type and Size: Next, I choose a red dot with the reticle type that aligns with my preferences. Whether it’s a dot, circle-dot, or holographic reticle, I’ll also consider the size—a balance between quick acquisition and maintaining visibility of the target.
  3. Battery Life: I prefer a red dot sight with an extended battery life, and an auto-off feature would be handy to conserve power when not in use.
  4. Durability and Construction: I’m a sport shooter and love shooting range tactical courses. Thus, I prioritize a sight with a robust build to withstand the Glock 20’s recoil. I’m also on the lookout for features like shockproof, waterproof, and fog-proof construction, materials like aircraft-grade aluminum are known for durability.
  5. Brightness Settings: I want a red dot sight with adjustable brightness levels for versatility in different lighting conditions from broad daylight to low-light scenarios.
  6. Mounting Options: I make sure that the chosen red dot sight comes with a compatible mounting system for the Glock 20. Whether it’s included or requires a separate purchase, it needs to fit seamlessly.
  7. Weight and Size: I usually factor in the weight and size of the red dot sight. Personally, I like the feel of a heavier sight, but you might prefer the opposite. 
  8. Ease of Use: Accessible controls and straightforward zeroing procedures are a big plus for me. A user-friendly design allows me to adjust my settings or change my batteries easily and quickly on the field. 

Other Recommend Red Dots for the Glock 20

While the sights mentioned above are my top choices, there are additional red dot sights for the Glock 20 that I recommend considering. These sights offer various features that can enhance your shooting experience.

  1. Aimpoint PRO (Patrol Rifle Optic)
    • Key Features: Long battery life, durable construction, night vision compatibility, and a crisp 2 MOA red dot.
    • Pros: Excellent build quality, reliable performance, and a budget-friendly option.
    • Cons: Slightly heavier than some competitors.
  2. Sig Sauer Romeo1 Pro
    • Key Features: Compact design, MOTAC (Motion Activated Illumination), and a 3 MOA red dot.
    • Pros: Durable construction, anti-reflection lens coating, and a wide field of view.
    • Cons: May be on the higher end of the price range.
  3. C-MORE Systems Railway Red Dot Sight
    • Key Features: Large 8 MOA dot, durable aluminum body, and multiple brightness settings.
    • Pros: Quick target acquisition, versatile for different shooting applications, and competitive pricing.
    • Cons: Some users may find the larger dot less precise for long-range shots.
  4. Bushnell Trophy TRS-25
    • Key Features: Affordable, compact, and features a 3 MOA red dot.
    • Pros: Lightweight, easy to mount, and suitable for budget-conscious buyers.
    • Cons: Battery life is not as long as some higher-end models.
  5. EOTech EXPS2 Holographic Sight
    • Key Features: Holographic reticle, quick target acquisition, and durable construction.
    • Pros: Wide field of view, versatile reticle options, and reliable in various conditions.
    • Cons: Relatively higher price point.

How to Properly Aim with a Red Dot Sight

Even if you have the best red dot sight in the world, it wouldn’t do much if you don’t know how to use it properly. It’s important to understand how to effectively aim with these devices.

  1. Check Sight Zero: Ensure that your red dot sight is properly zeroed. Align the point of impact with the reticle so that your shots hit the target where the dot indicates.
  2. Mount the Firearm: Bring the firearm up to your natural shooting position. Ensure a consistent and comfortable grip on the pistol.
  3. Acquire a Sight Picture: Look through the sight and acquire a sight picture by aligning the red dot with the target. The dot should appear on the target where you want your shot to land.
  4. Focus on the Target: Keep your focus on the target, not the red dot. Your brain will naturally superimpose the dot onto the target. This is crucial for situational awareness and quick target acquisition.
  5. Maintain Proper Eye Relief: Ensure you have the correct eye relief. You should be able to see the entire field of view within the sight without any black edges. 
  6. Use Both Eyes Open: Keep both eyes open when aiming with a red dot sight. This helps maintain situational awareness and allows you to see the target and its surroundings more effectively.
  7. Focus on the Reticle: While keeping your focus on the target, superimpose the reticle (red dot) onto the target. The dot should naturally align with your point of aim.
  8. Proper Shooting Stance: Maintain a proper shooting stance, whether it’s an isosceles, Weaver, or another stance that you are comfortable with. A stable and consistent stance contributes to accuracy.
  9. Practice Sight Transitions: If you’re using a red dot sight for rapid target acquisition or in a dynamic shooting scenario, practice sight transitions between different targets to improve your speed and accuracy.
  10. Control Your Breathing: Control your breathing to reduce movement and stabilize your aim. Take a deep breath, exhale, and then pause your breathing momentarily as you take your shot.
  11. Follow Through: After the shot, maintain your sight picture for a moment. This helps ensure you’re tracking the shot accurately, and it allows for follow-up shots if needed.
  12. Regular Training: Practice regularly to become familiar with your red dot sight and to build muscle memory. Regular training enhances your proficiency and accuracy when using the sight.


So there you have it! Whether you’re in the market for open reflex options like the Holosun 507K X2 or something more durable like the Leupold DeltaPoint Pro, these red dot sights for your Glock 20 will enhance your shooting experience.

At the end of the day, it’s all about finding the right fit for your style and budget. Keep practicing, and soon enough, you’ll be hitting your targets with precision.

About the author

The name's Chris. Just a regular dude who loves firearms. I've been shooting since I was a kid. My old man taught me the ropes.

I'll never forget the first time I missed an easy shot on a buck, thanks to a bum scope. The image was fuzzier than my dog's butt. After that, I got obsessed with understanding scopes. What makes the good ones tick and the bad ones trash. After a few years and a few thousand bucks, I learned what separates the winners from the losers. Once I had a good stockpile of knowledge, I launched this site.

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