The Glock 20 is a powerful firearm, popular for its reliability and effectiveness, particularly among those who need a robust sidearm for outdoor activities like hunting or personal defense.
To enhance its accuracy and performance, equipping it with a red dot sight can make a significant difference.
After extensive research and hands-on testing, I’ve compiled a list of the best red dot sights for the Glock 20, ensuring that each recommendation meets the highest standards for performance, durability, and user satisfaction.
Top Product List
Top 6 Best Red Dot for glock 20 of 2025
1. Trijicon RMR Type 2
Specifications:
- Weight: 1.2 oz
- Battery Life: 4 years on a single CR2032 battery
- Dot Size: 3.25 MOA
- Material: 7075-T6 aluminum
- Adjustment: 1 MOA per click
Best Features: The Trijicon RMR Type 2 is renowned for its durability and rugged construction. Its patented housing shape diverts the force of impacts away from the lens, making it an excellent choice for the Glock 20, especially in harsh environments.
Pros:
- Extremely durable and robust
- Long battery life
- Auto and manual brightness modes
- Clear, crisp dot
Cons:
- Expensive
- Slightly heavier than some competitors
Experience: Using the Trijicon RMR Type 2 on my Glock 20, I found the sight to be incredibly reliable. The clarity of the dot and the ease of acquiring targets quickly made it a standout. The battery life is also impressive, which means less downtime for replacements.
Customer Comments: Online discussions often highlight the RMR’s durability and dependability, particularly in outdoor and tactical settings. Users appreciate its reliability even under heavy recoil, making it a perfect fit for the Glock 20.
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2. Leupold DeltaPoint Pro
Specifications:
- Weight: 1.95 oz
- Battery Life: Up to 300 hours on highest setting, 1500 hours on medium setting
- Dot Size: 2.5 MOA
- Material: Aircraft-grade aluminum
- Adjustment: 1 MOA per click
Best Features: The Leupold DeltaPoint Pro stands out with its clear glass and large field of view, which is crucial for quick target acquisition. The motion sensor technology activates the sight when it detects movement, preserving battery life.
Pros:
- Large viewing window
- Motion sensor technology
- Rugged construction
- Easy battery access
Cons:
- Shorter battery life compared to some competitors
- Slightly bulkier
Experience: When mounted on my Glock 20, the DeltaPoint Pro provided a wide field of view, which was particularly useful in dynamic shooting situations. The motion sensor was a convenient feature, ensuring the sight was always ready when needed.
Customer Comments: Users frequently praise the large window and the sight’s ability to maintain zero even after extensive use. Its robustness and ease of use make it a popular choice among Glock 20 owners.
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3. Holosun HS507C X2
Specifications:
- Weight: 1.5 oz
- Battery Life: Up to 50,000 hours on a single CR1632 battery
- Dot Size: 2 MOA dot and 32 MOA circle
- Material: 7075 aluminum
- Adjustment: 1 MOA per click
Best Features: The Holosun HS507C X2 offers a versatile reticle system with multiple reticle options, including a 2 MOA dot and a 32 MOA circle, allowing for customizable targeting solutions. The sight is also solar-powered with a backup battery, enhancing its reliability.
Pros:
- Long battery life
- Solar power backup
- Multiple reticle options
- Affordable
Cons:
- Slightly complex to set up initially
- Some users report minor issues with brightness adjustment
Experience: I found the Holosun HS507C X2 to be a versatile and reliable sight for my Glock 20. The multiple reticle options allowed for greater flexibility in different shooting scenarios, and the solar power backup is an excellent feature for extended use.
Customer Comments: Many users highlight the sight’s affordability and feature-rich design. The long battery life and solar backup are often mentioned as major benefits, making it a practical choice for Glock 20 users.
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4. Vortex Venom
Specifications:
- Weight: 1.1 oz
- Battery Life: Up to 30,000 hours on lower settings
- Dot Size: 3 MOA
- Material: Aluminum alloy
- Adjustment: 1 MOA per click
Best Features: The Vortex Venom is known for its clear optics and easy-to-use controls. It features a top-loading battery compartment, which makes battery changes quick and easy without the need to remove the sight from the pistol.
Pros:
- Clear optics
- Easy battery replacement
- Lightweight
- Affordable
Cons:
- Shorter battery life on high settings
- Smaller field of view compared to some competitors
Experience: Mounting the Vortex Venom on my Glock 20, I was impressed by the clarity of the optics and the simplicity of the controls. The top-loading battery compartment is a significant advantage, ensuring minimal downtime for battery changes.
Customer Comments: Users often commend the Vortex Venom for its value for money, citing the clear optics and ease of use as major positives. Its lightweight design is also appreciated, making it a great fit for the Glock 20.
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5. Burris FastFire III
Specifications:
- Weight: 1.5 oz
- Battery Life: Up to 5,000 hours
- Dot Size: 3 MOA
- Material: Aluminum
- Adjustment: 1 MOA per click
Best Features: The Burris FastFire III is a compact and lightweight sight that offers excellent performance at an affordable price. It features automatic brightness adjustment, ensuring the dot is visible in various lighting conditions.
Pros:
- Lightweight and compact
- Affordable
- Automatic brightness adjustment
- Clear, precise dot
Cons:
- Shorter battery life
- Limited reticle options
Experience: The Burris FastFire III performed admirably on my Glock 20, with the automatic brightness adjustment proving particularly useful in changing light conditions. Its compact size made it easy to handle and didn’t add significant weight to the firearm.
Customer Comments: Many users appreciate the FastFire III for its compact design and automatic brightness adjustment. While some wish for longer battery life, the overall performance and affordability make it a popular choice for Glock 20 owners.
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6. Sig Sauer Romeo3
Specifications:
- Weight: 1.4 oz
- Battery Life: Up to 40,000 hours
- Dot Size: 3 MOA
- Material: Aluminum
- Adjustment: 1 MOA per click
Best Features: The Sig Sauer Romeo3 offers a robust design with a long battery life and excellent clarity. The motion-activated illumination system ensures the sight is ready when you need it, conserving battery life when not in use.
Pros:
- Long battery life
- Motion-activated illumination
- Durable construction
- Clear optics
Cons:
- Expensive
- Slightly bulkier than some competitors
Experience: When using the Sig Sauer Romeo3 on my Glock 20, I found the motion-activated illumination to be incredibly convenient. The sight’s clarity and robust construction instilled confidence, especially during extended shooting sessions.
Customer Comments: Users frequently highlight the Romeo3’s long battery life and the convenience of the motion-activated illumination. Its durability and clear optics are also commonly praised, making it a reliable option for the Glock 20.
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How to Choose the Best Red Dot Sight for Glock 20
Choosing the right red dot sight for your Glock 20 involves considering several key factors:
- Durability: Given the Glock 20’s power, the sight must withstand significant recoil and harsh conditions.
- Battery Life: Long battery life is crucial for reliability, ensuring the sight is ready when you need it.
- Brightness Settings: Multiple brightness settings, including automatic adjustment, can be beneficial in varying lighting conditions.
- Reticle Options: Some users prefer sights with multiple reticle options for greater flexibility.
- Ease of Use: Consider how easy it is to install, adjust, and replace the battery.
FAQs
Q: Can I use any red dot sight on my Glock 20? A: Not all red dot sights are suitable for the Glock 20. Ensure the sight is robust enough to handle the recoil and is compatible with the mounting system of your Glock.
Q: Do I need to get my Glock 20 slide milled to mount a red dot sight? A: Some red dot sights require slide milling, while others can be mounted using an adapter plate. Check the mounting requirements of the sight you choose.
Q: How do I zero a red dot sight on my Glock 20? A: To zero your red dot sight, you’ll need to adjust the windage and elevation until the dot aligns with the point of impact at your desired distance. This typically involves shooting groups and making incremental adjustments.
Q: Will a red dot sight affect my holster fit? A: Yes, adding a red dot sight may require a holster designed to accommodate the sight. Ensure your holster is compatible with your Glock 20 and the red dot sight.
Conclusion
Equipping your Glock 20 with the right red dot sight can significantly enhance its performance, providing faster target acquisition and improved accuracy.
Whether you choose the durable Trijicon RMR Type 2, the versatile Holosun HS507C X2, or any other sight from this list, each offers unique features and benefits tailored to different needs and preferences.
By considering the factors outlined in the guide, you can find the perfect red dot sight to complement your Glock 20, ensuring optimal performance in any situation.