5 Best Glock 20 Red Dot Sights

Last Update:

We independently review everything we recommend. When you buy through our links, we may earn an affiliate commission.

When it comes to reliable handguns, the Glock 20 stands out as one of the top choices for many. 

As an experienced shooter who has spent countless hours on the range, I’ve had the opportunity to test various red dots that complement this firearm. Among the many sights available, one has become my top choice: the Holosun 507K X2 red dot sight.

I’ve evaluated different sights through rigorous testing to find the best one, considering various factors like ease of use, alignment, and more. 

By the end of this article, you’ll gain insight into Best Glock 20 Red Dots.

Top 5 Best Red Dot For Glock 20

1. Holosun 507K X2 – My Top Choice

HOLOSUN HS507K X2 Multi-Reticle Red 2 MOA Dot & 32 MOA Circle Open Reflex Pistol Sight - Durable Shake-Awake Parallax-Free Aluminum Sight for Subcompact Handguns
  • HOLOSUN RED DOT SIGHT - The HS507K X2 is an open reflex...
  • HIGH PERFORMANCE - This red dot sight features...
  • MULTI-RETICLE SYSTEM - This Holosun sight is equipped...
  • SHAKE AWAKE TECHNOLOGY - Extends battery life by...
  • SPECIFICATION - Reticle: Red 2 MOA Dot & 32 MOA Circle;...

A game-changer in the red dot sight world, the Holosun 507K X2 offers every shooter a blend of innovation and functionality.

Long Battery Life: One of the highlights of the Holosun 507K X2 is its remarkable battery life. With 50,000 hours (on setting 6) and features like Lock Mode and Shake Awake technology, you won’t fumble for a new battery during your hunting trip.

Dot and Ring Reticle: The dot and ring reticle is an exciting feature. It’s ideal for precise targeting, ensuring accuracy even in fast-paced situations. 

If any part of the reticle hits the target, you’re good to go – a favorite among many shooters.

Multi-Coated Lens: The lenses are multi-coated to facilitate maximum light transmission, ensuring a bright reticle in sunlight and automatically adjusting in low conditions. 

This wear-resistant feature removes glare and promotes a clear view every time.

Shake Awake Technology: The innovative technology ensures that the LED sight turns off during periods of no motion. 

This smart tech ensures optimal brightness, adapting to your surroundings and conserving battery life.

Lock Mode: Lock Mode adds a layer of convenience, preventing unintentional button presses while holstered. 

Plus, the side access battery tray means that you don’t have to remove the optic from the firearm to change the battery.

Why I love it: The Holosun 507K X2 is more than just a sight; it’s a shooting companion. 

The integration of user-friendly features and cutting-edge technology makes it stand out.

My Experience 

When I mounted this sight on my Glock 20, it became an essential part of my shooting toolkit. Its responsiveness and adaptability to various environments gave me the confidence I needed.


  • Battery life that lasts up to 50,000 hours
  • Versatile and precise dot and ring reticle
  • Resilient multi-coated lens for clear vision
  • Energy-efficient with Shake Awake Technology
  • Lock Mode ensures user convenience


  • It may take time for new users to familiarize themselves with the buttons

2. Leupold DeltaPoint Pro – Robust Build

Leupold DeltaPoint Pro Red Dot Sight, 2.5 MOA Dot - Matte finish
  • Model #119688 - DeltaPoint Pro Red Dot Sight, 2.5 MOA...
  • Leupold’s Professional-Grade Red Dot Optical System...
  • This scopes comes with an illuminated reticle, which...
  • Motion Sensor Technology (MST) extends battery life by...
  • Design, Machined and Assembled in the USA. 100%...

The Leupold DeltaPoint Pro is a robust red dot sight with a clear, large view, professional-grade optics, and innovative features that adapt to both close-up and long-range shots.

Clear View and Size: What sets this sight apart is its larger-than-usual window and exceptional glass clarity. 

The 2.5 MOA size is perfect, catering to both close-up work and longer-range targets, enhancing your shooting experience by offering a better view.

Rugged Double Hood: The robustness of the DeltaPoint Pro is reflected in its double hood design. While it might not outdo all competitors like the RMR, this feature still offers substantial protection and ensures longevity, particularly in demanding environments.

Auto-On Function: The motion-sensing auto-on function is impressive. It’s incredibly fast and efficient, always activating before you complete your draw. 

This feature adds a touch of smoothness to your aim, always ready when you need it.

Professional-Grade Optical System: Leupold’s unmatched light transmission, glare reduction, and high-resolution clarity make the DeltaPoint Pro stand tall in the field. 

Even in harsh and direct light, it delivers a crystal clear image, making it a favorite among professionals.

Why I love it: Its blend of top-notch clarity, rugged build, intuitive auto-on function, and easy-to-change battery design makes this sight an all-around winner. 

It combines professional-grade features with user-friendly attributes.

My Experience 

From the moment I mounted the DeltaPoint Pro on my Glock 20, I felt an immediate enhancement in my shooting. The clear view, ease of use, and robust build have made it an invaluable part of my setup.


  • Exceptionally clear glass with a large window
  • Tough double hood for extra durability
  • Top-loading battery for hassle-free changes
  • Rapid motion-activated auto-on feature
  • Superior optical system for clear vision in all conditions


  • Lack of night vision compatibility

3. Burris FastFire 3 – Best for Target Shooting

Burris FastFire Reflex Red Dot Sight for Rifles, Pistols and Shotguns, FastFire III (8 MOA Dot), Black (300236)
  • Convenient power button with three levels of brightness...
  • Tool-less wind age and elevation adjustments
  • Low Battery warning indicator
  • 8 MOA Dot Reticle
  • Tool-less wind age and elevation adjustments

Step into the realm of precision with the Burris Fastfire 3, a remarkable micro red dot sight tailored for both enthusiasts and competitive shooters.

Affordability and Quality: If you’re on a budget but unwilling to compromise quality, the Fastfire 3 is your companion. This lightweight wonder, at only 0.9 oz, delivers excellence that defies its price tag.

Glass and View: Though the glass might not rival the Deltapoint, it’s less green and provides a slightly larger view. 

It’s like having an eagle-eye view on a budget, a clear and transparent window to your target, making it best for target shooting.

Battery Life: With a staggering life of up to 5 years, and a smart 9-hour auto-turnoff, the battery management here is akin to having a loyal friend watching your back.

Reticle Options: Whether you’re a close-range sharpshooter or need a more extensive sight, you get a choice between a 3 MOA or 8 MOA dot reticle. It’s like customizing your favorite car; you make it fit your style.

Durability and Reliability: Built like a mini fortress, this aluminum sight promises longevity. 

It’s shock-resistant, water-resistant, and known to hold zero, even after heavy use. When you’re out there, it’s your trusty ally, enduring whatever you throw at it.

Why I love it: This is like finding a hidden gem in the gadget world. It’s affordable yet well-crafted, simple yet versatile. It’s the everyday man’s red dot sight, serving its purpose without unnecessary extravagance.

My Experience

As someone who loves spending time at the range, attaching the Fastfire 3 to my Glock 20 was like breathing new life into my firearm. 

It’s lightweight, so my arms thank me after a long day, and the different reticle options make it adaptable to various scenarios. The clear lens and the responsive settings made it a joy to work with. It became a part of my gun, an extension of my aiming prowess.

Know The Difference between Burris Fastfire 3 & Leupold DeltaPoint Pro.


  • Affordable without cutting corners
  • Versatile reticle choices
  • Astounding battery management
  • Ready for long sessions with its lightweight design
  • Tough as nails


  • Could use better glass quality

4. Vortex Venom – Best Compact Red Dot Sight

Vortex Optics Venom Red Dot Sight - 3 MOA Dot,Black
  • The Venom Red Dot Sight-3 MOA promotes rapid target...
  • High quality, fully multi-coated lenses offer a clean,...
  • The Venom also has an auto-brightness mode that uses an...
  • 1 MOA wind age and elevation adjustments are super...
  • The Venom Red Dot will fit well on your rifle or...

Introducing the Vortex Venom, a compact and nifty red dot sight that seamlessly integrates high-end technology with functional design, offering a budget-friendly option for your Glock 20.

Weight: The first thing that you’ll notice about the Vortex Venom is its weight. At a mere 1.1 oz, it’s like a feather on your gun. 

You’ll barely notice it’s there, and that’s exactly what makes it so comfortable and user-friendly during those long days at the range.

Glass Quality and View: Glass quality is something Vortex never compromises on, and the Venom is no exception. The slightly wider field of view makes tracking targets easy. 

It’s not just a sight; it’s like having a buddy beside you, helping you see more clearly.

Battery Life: Battery life can make or break a red dot sight, but it’s all good news with the Vortex Venom. With 150 hours at the highest intensity and up to 30,000 at the lowest, it’s a reliable friend, ready to accompany you through thick and thin. 

Plus, with its top-mounted design, battery swapping is a piece of cake!

Brightness Adjustment: Here’s where the Venom really shines. Ten levels of brightness correction give you unparalleled control. 

Whether you’re shooting at dawn or under the harsh midday sun, you can dial in the perfect level of brightness to suit your surroundings. Think of it as adjusting the volume of your favorite song – it’s that easy.

Windage and Elevation: Adjusting windage and elevation has never been simpler. With a maximum elevation adjustment of 130 MOA and windage adjustment of 100 MOA, it’s like steering a high-performance car; smooth, responsive, and precise. 

The Venom’s accuracy is a revelation, holding zero after a hundred rounds.

I love it: The Vortex Venom is a standout product in the red dot sight market for many reasons. 

From its lightweight build to its top-notch glass quality, brightness adjustment, and ease of windage and elevation tuning.

My Experience 

Having the Vortex Venom on my Glock 20 was an experience that words can hardly describe. It was not just an accessory but an extension of myself. 

The clarity of the glass, the responsiveness of the brightness adjustments, and the precision in windage and elevation felt like they were crafted just for me.

See Detailed comparison of Burris Fastfire 3 & Vortex Venom


  • Incredibly lightweight and comfortable
  • Brilliant glass quality with a wider field of view
  • Top-mounted battery design for fuss-free swapping
  • Comprehensive brightness adjustments for all lighting conditions
  • Precise and effortless windage and elevation tuning


  • The viewing window size leaves something to be desired
  • Lacks night vision compatibility with the lowest brightness setting

5. Vortex Razor – Wide Lens

Vortex Optics Razor Red Dot Sight - 3 MOA Dot
  • The Razor Red Dot Sight-3 MOA is designed to be mounted...
  • A premium wide field lens gives the shooter an...
  • Anti-reflective XR coatings on the lenses increase...
  • O-ring sealed and a rugged one piece chasis constructed...
  • The Razor runs off a single CR2032 battery which can be...

The Vortex Razor 3 MOA Red Dot Sight is a top-of-the-line optic, boasting premium construction, a wide field of view, and unique features that enhance your shooting experience.

Construction: Designed with meticulous care, the Vortex Razor is made from aircraft-quality aluminum. It doesn’t just look robust; it’s shockproof to the core. 

The one-piece chassis is carefully engineered, allowing you to focus on the thrill of the shoot without worrying about the sight’s durability.

Lens Quality and Protection: With its multi-coated lens that offers a sweeping view, the sight is further protected by Vortex’s Armor Tek coating. 

This special coating keeps scratches and water at bay, ensuring that you have a clear and 

unobstructed sight, no matter the weather.

Battery Accessibility: Battery changes can be a drag, but not with the Vortex Razor. 

The convenient snap-lock side door is sealed with o-ring seals, providing quick access. It’s akin to a hidden treasure chamber that only you can access effortlessly when needed.

Adjustability: 1 MOA click adjustments for windage and elevation, controlled with supplied hex wrenches, make sighting in a precise and satisfying task. 

You’ll feel a genuine connection to your gear as you make these adjustments, giving you the sensation of fine-tuning a high-performance race car.

Red Dot Quality: The Razor’s red dot is a marvel of optical engineering. It’s crisp, clear, and blooms slightly at the highest settings. 

Whether tracking a fast-moving target or carefully aiming at a distant mark, the dot is your faithful ally, guiding you like a trusted friend.

Why I love it: The combination of advanced technology, robust construction, and thoughtful design make the Vortex Razor a joy to use. From the lens’s clarity to the ergonomic adjustments, this sight felt made for me.

My Experience 

My time with the Vortex Razor on my Glock 20 has been transformative. Every feature seems to complement my shooting style. 

Adjusting the windage and elevation felt intuitive, while the crisp red dot became an extension of my eye. The lens offered a wide, clear view, and the build gave me confidence that it would withstand anything I threw at it.


  • Superbly constructed with aircraft-quality aluminum
  • Exceptionally clear lens with scratch and water protection
  • Easy and secure battery accessibility
  • Fine-tuned adjustability for precise shooting
  • Crisp, clear red dot, even on the move


  • A slight parallax issue, although not a major concern in real-world scenarios

Learn About Glock 20 Problems

Final Verdict

After extensive testing, hands-on experience, and rigorous comparison, my journey led me to a single winner among the red dot sights for the Glock 20. 

Although each sight offered unique features and catered to different shooting needs and preferences, one stood above the rest: the Holosun 507K X2

This conclusion isn’t a mere reflection of specs and features; it’s based on a complete analysis of usability, quality, and real-world performance. 

Recognizing that individual needs vary, I encourage you to reflect on your specific requirements and preferences as you consider these top-notch options.


Can you put a red dot on Glock 20?

Yes, you can put a red dot on Glock 20 by choosing a sight specifically designed for it or one compatible with its mounting system.

Can I put an optic on a Glock 20?

Yes, you can put an optic on a Glock 20, particularly on the new G20 Gen5 MOS, which comes with GLOCK’s Modular Optic System (MOS) configuration.

What sights fit a Glock 20?

Sights that fit a Glock 20 include G20 Night Sights such as R3D sights, traditional 3-Dot tritium, notch and post sights, DXT2s, and F8 sights.

Is a Glock 20 powerful?

Yes, the Glock 20 is a powerful self-defense gun, with 10mm moving considerably faster than .40, ensuring significant stopping power.

How accurate is a Glock 20?

The Glock 20 is highly accurate and reliable. With the right optic like the Trijicon SRO, it provides beautiful precision in shooting.

One Request?

I worked hard on this post to help the shooters community. it would help me a lot if you consider sharing it on social media network

BecauseSharing Is Caring..

Because Sharing Is Caring..

Photo of author


I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.

2 thoughts on “5 Best Glock 20 Red Dot Sights”

  1. Excellent comparisons with specific information on each. Thank you for putting your experiences with each one in print for the average guy like myself who can’t afford to just run out and buy one after another until we find the one that suits us best.
    I may have to bite the bullet and purchase the Holosun SCS for my G20. From what I understand it is the only one that can be attached directly to the pistol without using the adapter plate.

    • I’m really glad you found the article helpful! Holosun SCS indeed a flush fit for the Glock 20. If you decide to go with the Holosun SCS, I’d love to hear how it works out for you on your G20.


Leave a Comment