Looking for the Best Red Dot for Glock 45 Gen 6 requires more than choosing a popular optic. I compared six options based on reticle design, window size, battery performance, durability, and mounting requirements.
From enclosed emitters to large competition windows, each sight offers different advantages. In this guide, I’ll review the top picks, break down the features that matter most, and share a buying guide to help you compare your options. I’ll also answer four common questions to help you make a more informed choice.
Best Red Dot for Glock 45 Gen 6
1) Trijicon RMR HD
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The Trijicon RMR Type 2 is a strong choice when looking for the best red dot for Glock 45 Gen 6. It combines a durable design with simple brightness controls. Its 1x magnification also gives you a clear sight picture without magnification.
The RMR Type 2 uses a patented housing that helps absorb impacts. It also redirects stress away from the lens. As a result, the optic is built to handle demanding use on slide ride pistols and other small arms.
The adjustable LED system gives you direct control over illumination. Side buttons let you adjust brightness, switch between manual and automatic modes, or power down the optic. You can also lock the buttons to prevent accidental changes.
The 3.25 MOA dot offers a useful balance between speed and precision. It is large enough to find quickly during close range shooting. At the same time, it remains small enough for accurate shots at longer distances.
The optic also works with night vision devices. In manual mode, the selected setting stays active for 16.5 hours after the last button press. It then returns to automatic mode.
Specifications
• Finish: Cerakote Flat Dark Earth
• Magnification: 1x
• Illumination source: LED
• Dot size: 3.25 MOA
• Illumination control: Adjustable
• Brightness modes: Manual and automatic
• Night vision compatible: Yes
• Button lockout: Yes
• Intended uses: Self defense, law enforcement, military, target shooting, and hunting
Pros
• Durable impact resistant housing
• Clear 3.25 MOA aiming dot
• Adjustable LED brightness
• Manual and automatic illumination modes
• Night vision compatible
• Button lockout helps prevent accidental changes
• 1x magnification suits pistol use
• Suitable for a wide range of applications
Cons
• RMR footprint limits compatibility with some mounting systems
2) Holosun 509T-X2
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The Holosun HE509T RD X2 is a strong option for anyone searching for the Best Red Dot for Glock 45 Gen 6. It is an enclosed LED optic designed for handgun use. Also, its grade 5 titanium housing gives it a durable build for demanding conditions.
The HE509T RD X2 uses a Multi Reticle System with a 32 MOA circle and 2 MOA dot. The circle helps your eye find the aiming point quickly. Meanwhile, you can switch it off and use only the 2 MOA dot for a cleaner sight picture and more precise aiming.
Another useful feature is Shake Awake technology. It turns the LED off when the optic is not being used. Then, a slight movement quickly activates it again. This helps extend the CR1632 battery life, which is rated for up to 50,000 hours.
The Solar Failsafe system provides another layer of power support. When the optic is in Auto Mode, it adjusts reticle brightness based on available light. Therefore, the reticle remains visible in changing conditions.
The sight also has 12 reticle intensity settings, including two designed for night vision. Plus, an RMR adapter plate is included for compatible mounting setups.
Specifications
• Reticle: 2 MOA Dot and 32 MOA Circle
• Magnification: 1x
• Light Wavelength: 650nm
• Power Source: Solar and Battery
• Battery Type: CR1632
• Battery Life: Up to 50,000 hours
• Brightness Settings: 10 daylight and 2 night vision
• Window Size: 0.66 × 0.9 inches
• Adjustment per Click: 1 MOA
• Windage and Elevation Travel: ±30 MOA
• Eye Relief: Unlimited
• Parallax: Free
Pros
• Durable grade 5 titanium housing
• Enclosed emitter design
• 2 MOA dot and 32 MOA circle reticle
• Shake Awake technology
• Solar Failsafe backup power
• Up to 50,000 hour battery life
• 12 brightness settings
• Night vision compatible
• RMR adapter plate included
Cons
• Larger than many open emitter pistol optics
3) Vortex Defender ST
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The Vortex Defender ST is a versatile option for anyone searching for the Best Red Dot for Glock 45 Gen 6. It uses a DeltaPoint Pro footprint and offers a larger window than the Defender CCW. As a result, it provides a wide sight picture while keeping the optic compact enough for everyday carry.
The Defender ST features a hard coated, aspherical lens. It provides a clear sight picture with reduced distortion and accurate colors. Also, the larger window helps you find the dot quickly during presentation.
Motion activation automatically wakes the optic when it is in sleep mode. Meanwhile, the 10 minute auto shutoff helps preserve battery life. You also get 12 brightness settings, so the dot can be adjusted for different lighting conditions.
The optic uses a CR2032 battery with a rated runtime of up to 25,000 hours at setting 6 when continuously active. In addition, button lockout prevents accidental brightness changes.
Durability is another major benefit. The textured front face provides extra grip when racking the slide against a surface. The optic is also waterproof and shockproof. Plus, ArmorTek protects the lens, while a ShockShield polymer insert helps absorb everyday impacts.
Specifications
• Footprint: DeltaPoint Pro
• Battery: CR2032
• Battery life: Up to 25,000 hours at setting 6
• Brightness settings: 12
• Motion activation: Yes
• Auto shutoff: 10 minutes
• Lens: Hard coated aspherical
• Mount: Picatinny rail mount included
• Construction: Waterproof and shockproof
• Lens protection: ArmorTek
• Warranty: Vortex VIP Unlimited Lifetime Warranty
Pros
• Large sight window
• Clear, distortion free view
• 12 brightness settings
• Motion activated illumination
• Up to 25,000 hours of battery life
• Button lockout mode
• Durable and weather resistant construction
• Textured front face for slide racking
• ShockShield polymer insert
• Lifetime VIP Warranty
Cons
• Larger than the Defender CCW
4) Osight C
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The Osight C is a strong option for anyone searching for the Best Red Dot for Glock 45 Gen 6. It is an open reflex sight designed for fast target acquisition and clear aiming. Also, its large viewing window provides a wider sight picture for quicker follow up shots.
The Osight C is designed for slides cut for the 407C and 507C footprint. However, other mounting systems require an adapter plate, which is not included. Therefore, check your Glock slide compatibility before buying.
The sight uses a side loading battery. This allows you to replace the battery without removing the optic. As a result, you do not need to re zero the sight after a battery change.
Another useful feature is the three reticle options. You can choose a 3 MOA dot, a 32 MOA circle, or both together. This gives you more flexibility for different shooting situations.
The large window works with multi coated lenses to improve light transmission. Consequently, the sight provides a clear view in both bright and low light conditions. The wider field of view also helps with faster target acquisition.
Finally, the motion sensor activates the optic when movement is detected. After three minutes without movement, it powers down to conserve battery life.
Specifications
• Footprint: 407C and 507C
• Reticle: 3 MOA Dot and 32 MOA Circle
• Reticle options: Dot, circle, or dot and circle
• Battery: Side loading
• Lens: Multi coated
• Field of view: Large window
• Motion activation: Yes
• Auto shutoff: 3 minutes
• Design: Open reflex sight
Pros
• Large sight window
• Multiple reticle options
• Side loading battery
• No need to remove the optic for battery replacement
• Multi coated lens
• Good light transmission
• Motion activated illumination
• Fast target acquisition
Cons
• Adapter plate is not included
5) Aimpoint ACRO P2
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The Aimpoint ACRO P2 is a strong choice for anyone searching for the Best Red Dot for Glock 45 Gen 6. It is an ultra compact enclosed red dot designed for demanding pistol applications. Also, its low profile design keeps the optic compact while providing a clear 3.5 MOA aiming point.
The ACRO P2 uses an improved LED emitter and a high capacity CR2032 battery. Together, they provide up to 50,000 hours of constant on battery life. That equals more than five years of continuous operation.
Another major benefit is the fully enclosed optical channel. Unlike open emitter designs, it protects the LED emitter from external elements. As a result, the optic is better suited to demanding environments.
The ACRO P2 is also built to handle significant abuse. Aimpoint designed it to withstand extreme G forces, shock, vibration, temperature changes, and material stress. It is also submersible to 115 feet, or 35 meters.
Furthermore, the low profile design makes it suitable for applications where a compact optic is important. The 3.5 MOA dot provides a balance between quick target acquisition and aiming precision.
Specifications
• Reticle: 3.5 MOA red dot
• Battery: CR2032
• Battery life: Up to 50,000 hours
• Runtime: More than 5 years
• Magnification: 1x
• Design: Fully enclosed optical channel
• Water resistance: Submersible to 115 feet or 35 meters
• Intended use: Pistol and low profile applications
• Included: CR2032 battery and Aimpoint T10 tool
Pros
• Fully enclosed emitter design
• Up to 50,000 hours of battery life
• 3.5 MOA red dot
• Low profile design
• Highly durable construction
• Resistant to shock and vibration
• Submersible to 35 meters
• Battery included
• Designed for demanding applications
Cons
• Higher price than many competing pistol optics
6) Holosun 507Comp
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The Holosun 507COMP is a strong choice for anyone searching for the Best Red Dot for Glock 45 Gen 6. It is designed for fast target acquisition and precise sight tracking. Also, its large 1.1 × 0.87 inch window gives you a wide field of view. This makes it especially useful for dynamic shooting.
The 507COMP uses Holosun’s Competition Reticle System. It combines a 2 MOA center dot with 8, 20, and 32 MOA circle options. You can use each reticle alone or combine them. Therefore, you can adjust the sight picture to suit your preference or shooting situation.
The large competition window helps you find the reticle quickly. It also supports faster transitions between targets. Meanwhile, manual brightness controls let you set the reticle to your preferred intensity. Memory Mode and Lock Mode help keep those settings consistent.
Shake Awake technology activates the optic when movement is detected. It also powers the sight down while idle to conserve battery life. In addition, the side loading CR1632 battery tray lets you replace the battery without removing the optic.
The optic uses durable 7075 T6 aluminum and has an IP67 waterproof rating. Plus, the Super LED provides up to 50,000 hours of battery life on setting 6.
Specifications
• Reticle: 2 MOA dot with 8, 20 and 32 MOA circles
• Window size: 1.1 × 0.87 inches
• Battery: CR1632
• Battery life: Up to 50,000 hours
• Brightness control: Manual
• Shake Awake: Yes
• Housing: 7075 T6 aluminum
• Waterproof rating: IP67
• Footprint: RMR
• Design: Open reflex sight
Pros
• Large competition window
• Multiple reticle options
• Fast target acquisition
• Up to 50,000 hours of battery life
• Side loading battery tray
• Shake Awake technology
• Memory and Lock Modes
• Durable 7075 T6 aluminum housing
• IP67 waterproof rating
• RMR footprint
Cons
• Large window may feel oversized for some concealed carry setups
Read also; 5 Best Red Dot for APX A1 Carry
Factors to Consider when Choosing the Best Red Dot for Glock 45 Gen 6
Choosing the Best Red Dot for Glock 45 Gen 6 depends on more than the reticle alone. You should also consider the optic’s mounting system, durability, battery life, and overall design. Here are eight important factors to compare;
1. Footprint and Compatibility
First, check the optic’s footprint and your Glock slide cut. Different red dots use different mounting patterns. Therefore, an optic might require an adapter plate before it fits your setup. A proper fit also helps maintain stability and simplifies installation. Always verify compatibility before buying.
2. Reticle Type and Size
The reticle affects how quickly you can find your aiming point. A smaller dot can offer more precise aiming, while a larger dot is often easier to pick up quickly. Some optics also offer circle and dot combinations. Therefore, consider whether you prefer a simple dot or multiple reticle options.
3. Sight Window
Next, consider the size of the viewing window. A larger window gives you a wider sight picture. As a result, it can make the reticle easier to locate during a fast presentation. However, a larger window can also increase the overall size of the optic. Choose a balance that suits your intended use.
4. Battery Life and Power Management
Battery life is another important factor. A long lasting battery reduces how often you need to replace it. Additionally, features such as motion activation and automatic shutoff help conserve power. A side loading battery tray is also useful because you can change the battery without removing the optic.
5. Durability and Weather Resistance
A pistol optic needs to handle everyday impacts and harsh conditions. Therefore, look for strong housing materials and good resistance to shock and vibration. Water resistance is also important if the optic will be exposed to rain or moisture. Lens protection can further help maintain a clear sight picture during regular use.
6. Brightness Settings and Visibility
The reticle needs to remain visible in different lighting conditions. For example, bright outdoor conditions require enough illumination to keep the dot easy to see. Conversely, lower light requires a setting that does not appear excessively bright. Therefore, multiple brightness settings give you more control. Some models also offer settings for night vision use.
7. Enclosed or Open Emitter Design
The emitter design is another factor to consider. An open emitter optic leaves the LED area exposed, while an enclosed design protects it from external elements. Therefore, an enclosed optic can offer additional protection from debris, moisture, and other environmental conditions. However, open designs can be more compact and provide a different balance of size and visibility.
8. Size, Weight, and Intended Use
Finally, consider the optic’s overall size and weight. A compact optic can be easier to carry and conceal. On the other hand, a larger window can improve target acquisition and sight tracking. Therefore, think about how you plan to use the Glock. For everyday carry, size and weight might matter more. For competition or range use, a larger window and additional controls may be more valuable.
Best Red Dot for Glock 45 Gen 6 FAQs
What is the best red dot for Glock 45 Gen 6?
The Best Red Dot for Glock 45 Gen 6 depends on your needs. First, check the footprint and slide compatibility. Then, consider the reticle, window size, battery life, and durability. For everyday use, prioritize a compact and reliable optic. For competition, a larger window and multiple reticle options may be more useful.
What size red dot is best for a Glock 45 Gen 6?
A 2 MOA to 6 MOA dot is a practical range for a pistol. Smaller dots offer more precision. However, larger dots are usually easier to find quickly. Therefore, a medium sized dot can provide a good balance between speed and precision.
Should I choose an enclosed or open red dot?
Both designs have advantages. An enclosed optic protects the emitter from debris and moisture. Meanwhile, an open optic often provides a larger viewing window with a compact design. Therefore, consider your environment and intended use before choosing between them.
How important is battery life on a pistol red dot?
Battery life is very important for a pistol optic. A longer runtime means fewer battery changes. In addition, features such as Shake Awake and automatic shutoff help conserve power. Therefore, look for an optic with long battery life and convenient battery access.
Final Thoughts
Choosing the Best Red Dot for Glock 45 Gen 6 comes down to compatibility, durability, and ease of use. First, check the footprint and mounting requirements. Then, consider the reticle, sight window, battery life, and brightness settings. A durable optic also provides better reliability during regular use.
Meanwhile, features such as motion activation and side loading batteries add convenience. Finally, choose an optic that matches your intended use and shooting style. With the right combination of these features, you can find a reliable red dot that offers fast target acquisition, clear aiming, and consistent performance.