When I’m choosing the Best Red Dot Sight for Glock 19 Gen 6 MOS, I look for an optic that combines reliable mounting compatibility, a clear and easy to acquire reticle, durable construction, dependable battery life, and useful features such as motion activation and adjustable brightness.
The Gen 6 Optic Ready System is designed to accommodate multiple optic patterns through its factory plates, with Plate #02 supporting RMR footprint optics, giving me plenty of flexibility when selecting a sight. These red dots are particularly well suited to the Glock 19 Gen 6 MOS because they can provide faster target acquisition, a more intuitive aiming reference, and improved visibility across different lighting conditions.
In this guide, I’ll cover the key features I look for, my top red dot picks, the important factors to consider before buying, and frequently asked questions to help me choose the right optic for my Glock 19 Gen 6 MOS.
Best Red Dot Sight For Glock 19 Gen 6 Mos
1) HOLOSUN 407C/507C-X2 Series
The HOLOSUN 407C/507C X2 Series is a strong option for the Glock 19 Gen 6 MOS because it combines a proven RMR footprint with a durable housing, long battery life, and convenient automatic power features. For the 407C X2 specifically, the 2 MOA red dot provides a clean aiming point while the large open reflex window gives a broad sight picture for quick target acquisition.
Since the Glock 19 Gen 6 MOS uses Gen 6 Plate #2 for RMR footprint optics, the 407C X2 can be mounted using the adapter plate included with the pistol, without requiring additional mounting hardware.
One of the most important advantages of the HS407C X2 is its RMR footprint. This is an industry standard mounting pattern that works with the Glock 19 Gen 6 MOS when paired with the appropriate factory adapter plate. Gen 6 Plate #2 is designed for RMR footprint optics, so mounting the 407C X2 is relatively straightforward. This makes the optic a practical choice for users who want a full sized pistol red dot without having to modify the slide.
The 2 MOA red dot offers a precise aiming point while maintaining a generous field of view. With 1x magnification, unlimited eye relief, and a parallax free design, the optic is designed to provide a consistent sight picture. The 0.63 x 0.91 inch window also gives the shooter a useful viewing area for acquiring the dot quickly.
Battery performance is another major advantage. The HS407C X2 uses a CR1632 battery and is rated for up to 50,000 hours of battery life under specified conditions. The side mounted battery tray makes battery replacement easier because the optic does not need to be removed from the pistol just to access the battery compartment.
The Shake Awake system helps conserve battery power by deactivating the LED when the optic is not being used. Movement automatically reactivates the reticle, allowing the sight to return to operation when the pistol is handled. Depending on the model and settings, the activation period can be configured from short intervals up to 12 hours, or the feature can be disabled altogether.
Solar Failsafe adds another layer of power management. When the optic is operating in Auto Mode and sufficient natural or artificial light is available, the solar system can help power the reticle and automatically adjust brightness according to surrounding conditions. This gives the 407C X2 an additional power source while also helping maintain reticle visibility across changing lighting environments.
Durability comes from the 7075 T6 aluminum housing, which is designed to handle the demands of pistol use. The optic also includes Lock Mode, which prevents accidental button presses from changing the settings once the preferred configuration has been established. The combination of a robust housing, protected controls, and automatic power features makes the X2 series well suited to users looking for a practical pistol optic.
The HS407C X2 uses a red 2 MOA dot with a 650nm wavelength and offers 10 daylight brightness settings plus 2 night vision settings. Windage and elevation adjustments provide ±50 MOA of travel, with 1 MOA adjustment per click. These specifications give the optic enough adjustment range for a wide variety of mounting and zeroing requirements.
Pros
- RMR footprint works with the Glock 19 Gen 6 MOS when using Gen 6 Plate #2
- No additional mounting hardware is required when the appropriate factory Glock adapter plate is included
- Crisp 2 MOA red dot provides a precise aiming point
- Up to 50,000 hours of battery life
- Convenient side loading CR1632 battery tray
- Solar Failsafe provides an additional power source in suitable lighting
- Shake Awake helps conserve battery power
- 7075 T6 aluminum housing provides a durable construction
- Lock Mode helps prevent accidental setting changes
- Large open reflex window provides a broad field of view
- Parallax free design with unlimited eye relief
Cons
- Open emitter design provides less protection from debris than an enclosed emitter optic
The HOLOSUN 407C X2 is a well rounded red dot sight for the Glock 19 Gen 6 MOS, particularly for users who want the familiar RMR mounting pattern and a durable open reflex design. Its 2 MOA dot, 50,000 hour battery rating, Shake Awake technology, Solar Failsafe, side loading battery tray, and 7075 T6 aluminum housing give it a useful combination of precision, convenience, and durability.
Most importantly, the RMR footprint works with the Glock 19 Gen 6 MOS through Gen 6 Plate #2, making installation straightforward with the factory mounting system.
2) HOLOSUN 407C/507C-X2 Series
The HOLOSUN 407C/507C X2 Series is an excellent choice for the Glock 19 Gen 6 MOS, offering a durable open reflex design, long battery life, and useful reticle options. The HS507C X2 is particularly appealing because it combines a 2 MOA dot with a 32 MOA circle through Holosun’s Multi Reticle System, giving users flexibility in how they prefer to view the aiming point. Its RMR footprint also makes it compatible with the Glock 19 Gen 6 MOS when used with the factory Gen 6 Plate #2.
The HS507C X2 uses the industry standard RMR footprint, making it a natural match for the Glock 19 Gen 6 MOS. The pistol comes with adapter plates, and Gen 6 Plate #2 is designed to accommodate RMR footprint optics. This means the 507C X2 can be mounted using the appropriate factory Glock adapter plate without requiring an additional mounting system.
The Multi Reticle System is one of the most useful features of the 507C X2. It provides a 2 MOA dot and 32 MOA circle, allowing the user to select the reticle configuration that best suits their preference. The smaller dot provides a precise aiming point, while the larger circle can make the reticle easier to pick up quickly. Users can also choose the combined circle and dot configuration.
The optic uses Holosun’s Red Super LED and provides up to 50,000 hours of battery life under specified conditions. It runs on a CR1632 battery housed in a side loading tray, which allows the battery to be replaced without removing the optic from the pistol. This is a convenient design for maintaining the sight after installation and zeroing.
Shake Awake technology helps conserve battery power by turning off the LED when the optic has remained inactive for a selected period. Movement can reactivate the reticle almost instantly. Depending on the configuration, the activation period can be set from 10 minutes to 12 hours, or the feature can be disabled if preferred.
Solar Failsafe provides an additional power source when adequate natural or artificial light is available. When operating in Auto Mode, the system can automatically adjust reticle intensity according to the surrounding light. The reticle becomes brighter in brighter conditions and steps down in lower light, helping maintain visibility while managing power consumption.
The 507C X2 is built with a 7075 T6 aluminum housing and has an anodized surface finish. This construction gives the optic a durable platform for pistol applications. Lock Mode is also included, allowing the buttons to be locked to help prevent accidental changes to brightness or other settings during handling.
The sight uses a 1x optical system with parallax free performance and unlimited eye relief. Its 0.63 x 0.91 inch window provides a broad viewing area, while 1 MOA adjustment increments and ±50 MOA of windage and elevation travel provide useful adjustment capability when zeroing the optic.
The HS507C X2 also includes a T10 L key, CR1632 battery, lens cloth, and user manual. With its combination of the RMR mounting pattern, Multi Reticle System, solar backup, Shake Awake, and durable aluminum housing, it offers a feature rich package for the Glock 19 Gen 6 MOS.
Pros
- RMR footprint is compatible with the Glock 19 Gen 6 MOS using Gen 6 Plate #2
- Factory Glock adapter plate can be used for mounting
- Multi Reticle System provides a 2 MOA dot and 32 MOA circle
- Up to 50,000 hours of battery life
- Solar Failsafe provides an additional power source in suitable lighting
- Shake Awake technology helps extend battery life
- Side loading CR1632 battery tray simplifies battery replacement
- Durable 7075 T6 aluminum housing
- Lock Mode helps prevent accidental setting changes
- Parallax free optical system with unlimited eye relief
- Large viewing window supports quick reticle acquisition
- Includes both daylight and night vision compatible brightness settings
Cons
- Open reflex design leaves the emitter more exposed to environmental debris than an enclosed emitter optic
The HOLOSUN 507C X2 is a strong all around red dot sight for the Glock 19 Gen 6 MOS. Its RMR footprint works with the pistol’s Gen 6 Plate #2, while the durable 7075 T6 aluminum housing provides a solid platform for a full sized pistol optic. The 2 MOA dot and 32 MOA circle give the Multi Reticle System considerable flexibility, making it appealing to users who want more than a single aiming point.
3) OSIGHT C Micro Red/Green Dot Open Reflex Sight
The OSIGHT C Micro Red/Green Dot Open Reflex Sight is an appealing option for the Glock 19 Gen 6 MOS, especially for users who want a compact open reflex optic with a flexible reticle system and extremely long battery life.
It uses the same Ruggedized Miniature Reflex footprint associated with optics such as the Holosun 407C and 507C, allowing it to work with the Glock 19 Gen 6 MOS when the appropriate RMR/MOS adapter plate is used. The optic combines a 3 MOA dot and 32 MOA circle, a large viewing window, Shake Awake functionality, and a durable 7075 T6 aluminum housing.
The OSIGHT C uses the RMR/407C/507C footprint, making it compatible with slides cut for the Ruggedized Miniature Reflex pattern. For the Glock 19 Gen 6 MOS, Gen 6 Plate #2 is the appropriate factory adapter plate for this footprint.
The important consideration is that the OSIGHT C itself does not include an RMR/MOS adapter plate. Since the Glock 19 Gen 6 MOS is supplied with adapter plates, users can use the appropriate factory plate rather than purchasing a separate mounting solution.
Reticle flexibility is another useful feature of the OSIGHT C. It provides a 3 MOA dot and 32 MOA circle through its Multi Reticle System, allowing the user to switch between dot and circle, dot only, or circle only. The 3 MOA dot provides a relatively precise aiming point, while the larger circle can make the reticle easier to locate within the viewing window.
The optic features a large field of view supported by a multi coated lens with anti reflective coatings. The larger window provides a broad sight picture, while the coatings are designed to improve light transmission and optical clarity. This combination can make it easier to locate the reticle and maintain the sight picture during rapid follow up shots.
Battery management is a major advantage of the OSIGHT C. The sight is rated for up to 100,000 hours of battery life, which is an exceptionally long stated runtime. Its side loading battery tray allows the battery to be replaced without removing the optic from the pistol. This design means users can access the battery while leaving the optic mounted, reducing the need to repeat the mounting and zeroing process after a battery change.
The motion sensor further helps conserve battery power. The optic activates when movement is detected and powers down after approximately three minutes of inactivity. This automatic activation and shutdown system reduces the need to manually manage the optic every time it is used while helping extend battery life.
Construction is another area where the OSIGHT C offers useful specifications. The housing is made from 7075 T6 aluminum, providing a durable structure while keeping the optic suitable for pistol applications. The sight is also rated IPX6 for water resistance, giving it protection against powerful water jets and making it better suited to changing outdoor conditions.
The OSIGHT C is available with either a red or green reticle configuration depending on the model. This gives users an opportunity to choose the reticle color they find easiest to see in their preferred lighting conditions. The combination of a flexible reticle, large viewing window, motion activation, and long battery life makes the optic a feature rich option for the Glock 19 Gen 6 MOS.
Pros
- RMR/407C/507C footprint works with the Glock 19 Gen 6 MOS using the appropriate Gen 6 MOS adapter plate
- 3 MOA dot and 32 MOA circle provide multiple reticle configurations
- Up to 100,000 hours of stated battery life
- Side loading battery tray allows battery replacement without removing the optic
- Motion sensor automatically activates the optic when movement is detected
- Three minute inactivity shutdown helps conserve battery power
- Large viewing window provides a broad sight picture
- Multi coated lens is designed to improve light transmission and clarity
- Durable 7075 T6 aluminum housing
- IPX6 water resistance
- Lifetime warranty provides additional ownership support
- Available with red or green reticle options
Cons
- RMR/MOS adapter plate is not included with the optic
The OSIGHT C Micro Red/Green Dot Open Reflex Sight is a versatile choice for the Glock 19 Gen 6 MOS, particularly for users who value reticle flexibility and long battery life. Its RMR/407C/507C footprint makes it compatible with the Glock’s Gen 6 Plate #2 mounting system, although buyers should remember that the optic does not include the RMR/MOS adapter plate.
4) Vector Optics Genii Frenzy 1x24x29 6 MOA Red Dot
The Vector Optics Genii Frenzy 1x24x29 6 MOA Red Dot is a compelling option for the Glock 19 Gen 6 MOS for users who prioritize a large viewing window and fast reticle acquisition. Its 1x24x29 window is notably large for a pistol optic, giving the shooter a broad sight picture that can be useful for dynamic shooting. The optic uses a MOJ footprint designed to work with RMR compatible mounting plates, making it likely to work with the Glock 19 Gen 6 MOS when paired with the correct factory adapter plate.
The Genii Frenzy uses a standard MOJ footprint that is compatible with RMR optic ready cuts and mounting plates. The Glock 19 Gen 6 MOS comes with factory adapter plates, with Gen 6 Plate #2 designed for RMR footprint optics. This makes the Genii Frenzy a likely fit for the pistol, although users should verify the exact interface between the optic, adapter plate, and slide before installation.
One of the most noticeable characteristics of the Genii Frenzy is its extra large 1x24x29 viewing window. The generous sight picture is designed for rapid target acquisition and increased situational awareness, making the optic particularly attractive for dynamic pistol shooting and competitive applications. A larger window can also make it easier to locate the 6 MOA dot without spending as much time searching for the reticle.
The 6 MOA red dot is designed with fast acquisition in mind. Compared with smaller dot sizes, a 6 MOA reticle presents a larger aiming point that can be easier to see quickly, particularly during high speed shooting. The optic provides nine brightness settings, along with two night vision compatible modes, allowing the reticle to be adjusted for different lighting conditions.
Shake Awake technology helps manage the optic’s power consumption by automatically putting the sight into sleep mode when it remains idle. Movement activates the optic again, allowing the reticle to return to operation without requiring manual activation. The side mounted battery compartment also makes battery replacement more convenient because the optic can remain mounted during the process, helping avoid the need to re zero after changing the battery.
Battery life is rated at up to 50,000 hours, giving the Genii Frenzy a substantial operating lifespan. The combination of long battery life, motion activation, and a side loading battery compartment makes the sight convenient for users who want to minimize routine battery maintenance.
Durability is another important part of the design. The housing is constructed from 7075 T6 aluminum and is rated to withstand up to 1500G of shock. This construction is intended to handle the recoil generated by common handgun calibers, including 9mm, .40, and .45. The IPX7 waterproof rating provides additional protection, with the optic designed to withstand immersion in up to one meter of water for up to 30 minutes.
There is one mounting consideration worth keeping in mind. A reviewer noted that the window extends forward of the footprint. Depending on the specific slide cut and adapter configuration, this forward extension could create a tighter fit. While the optic has been reported on Glock MOS platforms and similar Glock models, users should carefully confirm clearance before installation.
Pros
- MOJ footprint is designed for RMR compatible optic ready cuts
- Likely compatible with the Glock 19 Gen 6 MOS using the appropriate Gen 6 Plate #2
- Extra large 1x24x29 viewing window provides a broad sight picture
- 6 MOA dot is easy to see and designed for rapid target acquisition
- Nine brightness settings provide flexibility across lighting conditions
- Two night vision compatible brightness modes
- Up to 50,000 hours of battery life
- Shake Awake motion sensor helps conserve battery power
- Side mounted battery allows replacement without removing the optic
- 7075 T6 aluminum construction
- IPX7 waterproof rating
- Rated to withstand up to 1500G of shock
Cons
• Compatibility should be verified because the MOJ footprint and adapter combination can vary by slide
The Vector Optics Genii Frenzy 1x24x29 6 MOA Red Dot is an interesting choice for the Glock 19 Gen 6 MOS because it emphasizes speed and visibility through its exceptionally large viewing window. The 6 MOA dot is designed for quick recognition, while nine brightness settings and two night vision modes provide flexibility for different lighting environments.
5) HOLOSUN 407C/507C-X3 Series
The HOLOSUN 407C/507C X3 Series is a highly capable red dot platform for the Glock 19 Gen 6 MOS, combining a proven RMR mounting pattern with upgraded durability, power management, and reticle options.
The X3 series is designed around the 407C and 507C footprint, which corresponds with the RMR mounting pattern supported by the Glock 19 Gen 6 MOS’s Plate #2. This means the optic can be installed using the factory Glock adapter plate without requiring additional mounting hardware.
The RMR footprint is one of the main reasons the 407C/507C X3 Series works so well with the Glock 19 Gen 6 MOS. The X3 models explicitly list 407C, 507C, and RMR mounting compatibility, while the Glock’s Gen 6 Plate #2 accommodates the RMR pattern. This provides a straightforward mounting solution using the adapter plate supplied with the pistol.
Reticle options vary depending on the X3 model. The 407C series provides a 2 MOA dot, while the 507C series uses Holosun’s Multi Reticle System with a 2 MOA dot and 32 MOA circle. Users can select the dot, circle, or combined reticle configuration according to the specific model and preferred sight picture. The series is also available with red, green, or gold reticle options, providing additional flexibility for different visibility preferences.
The X3 series brings a significant battery life improvement, with a rated battery life of up to 100,000 hours under specified conditions. Solar Failsafe is supported by a forward facing photodiode that helps the optic use available ambient light and automatically control reticle brightness. Manual brightness controls are also available, with lockout and memory modes helping users maintain their preferred settings.
Shake Awake technology further assists with power management. When the optic is inactive, the system can put the LED into a low power state. Movement activates the sight again, allowing the reticle to become available without requiring the user to manually switch the optic on every time it is handled.
Durability is another important part of the X3 design. The housing is made from rugged 7075 T6 aluminum with a hard anodized finish, while the optic carries an IP67 waterproof rating and is engineered to withstand up to 5000G of vibration. These specifications give the X3 series a strong construction for demanding pistol applications.
The upgraded X3 housing also features an overhang design intended to help reduce glare. This new square frame gives the optic a distinctive appearance while adding protection around the lens area. Combined with multi coated optics, the design is intended to provide a clear sight picture while reducing unwanted reflections in bright conditions.
The optic offers 12 brightness settings, including options suitable for a wide range of lighting conditions. The parallax free optical system provides unlimited eye relief, allowing the shooter to maintain the reticle without needing to position the eye at a specific distance behind the optic.
The combination of a forward facing solar sensor, 100,000 hour battery rating, Shake Awake technology, upgraded housing, and high impact resistance makes the X3 series a substantial evolution from the earlier X2 platform. For users looking for a feature rich RMR footprint optic, the X3 series provides a particularly comprehensive package.
Pros
- RMR footprint is directly compatible with the Glock 19 Gen 6 MOS using Gen 6 Plate #2
- No additional mounting hardware is required when using the appropriate factory Glock adapter plate
- Up to 100,000 hours of stated battery life
- Solar Failsafe uses a forward facing photodiode for automatic brightness control
- 407C models provide a simple 2 MOA dot
- 507C models offer a Multi Reticle System with a 2 MOA dot and 32 MOA circle
- Available with red, green, and gold reticle options depending on model
- Shake Awake technology helps conserve battery power
- IP67 waterproof rating
- Rated for up to 5000G of vibration resistance
- Durable 7075 T6 aluminum housing
- Hard anodized finish provides additional surface protection
- Overhang housing design helps reduce glare
- 12 brightness settings provide extensive illumination control
- Lockout and memory modes help maintain preferred settings
- Parallax free design with unlimited eye relief
- Multi coated optics support a clear sight picture
- Lifetime manufacturer warranty
Cons
- The larger 407C and 507C format is less compact than smaller pistol optics
The HOLOSUN 407C/507C X3 Series is an excellent match for the Glock 19 Gen 6 MOS, offering a combination of straightforward RMR compatibility and significant improvements in battery performance, durability, and power management. The factory Gen 6 Plate #2 provides the appropriate mounting interface, allowing the optic to be installed without purchasing another adapter plate.
6) Trijicon RMR Type 2 6.5 MOA Adjustable LED Red Dot Sight
The Trijicon RMR Type 2 6.5 MOA Adjustable LED is a proven pistol red dot that pairs naturally with the Glock 19 Gen 6 MOS because it uses the standard RMR footprint. The Glock 19 Gen 6 MOS includes Gen 6 Plate #2, which accepts RMR footprint optics, so the RMR Type 2 can be mounted directly with the appropriate factory MOS plate.
With its rugged aluminum housing, adjustable brightness, battery conservation mode, and 6.5 MOA dot, this optic is designed for users who want a durable and straightforward aiming solution.
Compatibility is one of the biggest advantages of the RMR Type 2 on the Glock 19 Gen 6 MOS. The optic uses the industry standard RMR footprint, while Gen 6 Plate #2 is designed for this mounting pattern. This means users can mount the RMR directly to the factory MOS adapter plate without purchasing an aftermarket adapter.
There is an important distinction regarding the specific version being purchased. The listing described here includes an RM33 Low Picatinny Rail Mount, which is intended for long guns and rail mounted applications. For a Glock 19 Gen 6 MOS, the preferred configuration is the RMR Type 2 with no mount so that the optic can sit directly on the factory MOS adapter plate.
The 6.5 MOA red dot provides a large, easily visible aiming point. This reticle size is particularly useful for users who prioritize quick reticle recognition and acquisition. The optic includes eight brightness settings, including two night vision settings and a super bright setting, allowing illumination to be adjusted according to the surrounding conditions.
The RMR Type 2 also offers automatic brightness functionality. Its electronics can respond to ambient lighting conditions, helping maintain an appropriate reticle intensity as the environment changes. This provides an alternative to constantly making manual brightness adjustments.
Battery management is supported by a battery conservation mode that automatically adjusts the aiming dot to ambient lighting conditions after approximately 16.5 hours. Button lockout is also included, allowing the RMR to remain in automatic mode and helping prevent accidental changes to the brightness settings during use.
Durability is a major part of the RMR Type 2 design. The housing is made from forged military grade aluminum, with a shape engineered to divert impact forces away from the lens. Ruggedized battery contacts and electronics are designed to improve reliability and survivability in demanding environments.
The RMR Type 2’s compact construction also makes it well suited to pistol applications. Rather than relying on a large external housing, the optic uses a ruggedized design intended to protect its internal components while keeping the overall sight relatively compact.
Pros
- RMR footprint is directly compatible with the Glock 19 Gen 6 MOS using Gen 6 Plate #2
- No aftermarket adapter is required for direct MOS mounting
- 6.5 MOA dot is large and easy to acquire
- Eight brightness settings provide useful illumination flexibility
- Includes two night vision compatible brightness settings
- Automatic brightness mode adjusts the reticle according to ambient lighting
- Battery conservation mode helps extend battery performance
- Button lockout helps prevent accidental brightness changes
- Forged military grade aluminum housing provides rugged construction
- Ruggedized battery contacts and electronics are designed for demanding conditions
- Impact resistant housing design helps protect the lens and internal components
- Well established RMR footprint provides broad mounting compatibility
Cons
- The RM33 Low Picatinny Rail Mount version is not the appropriate configuration for direct Glock MOS slide mounting
The Trijicon RMR Type 2 6.5 MOA Adjustable LED is a strong choice for the Glock 19 Gen 6 MOS, particularly for users who value a rugged construction and the proven RMR mounting pattern. Gen 6 Plate #2 provides the appropriate interface, allowing the RMR to mount directly to the Glock’s MOS system without an aftermarket adapter.
7) Primary Arms CLx Enclosed Reflex Sight
The Primary Arms CLx Enclosed Reflex Sight is an appealing compact option for the Glock 19 Gen 6 MOS, particularly for users who want an enclosed emitter that protects the reticle from dust, rain, and debris. Its compact dimensions, 3 MOA red dot, AutoLive motion sensing, side loading battery tray, and lightweight aluminum housing give it a practical feature set for a compact pistol.
However, mounting compatibility requires more attention than RMR footprint optics because the CLx uses the Shield RMSc footprint rather than the standard RMR pattern.
The CLx is designed around the Shield RMSc footprint, which is commonly used on compact and slimline pistol slides. This creates an important distinction for Glock 19 Gen 6 MOS owners. The standard Gen 6 Plate #2 is intended for RMR footprint optics and will not directly fit the RMSc footprint used by the CLx. Buyers should therefore check the adapter plates supplied with their particular Glock 19 Gen 6 MOS to determine whether an RMSc compatible plate is included.
If the factory plate kit does not contain an appropriate Shield RMSc adapter, an aftermarket RMSc compatible MOS plate can provide the necessary mounting interface. Confirming the footprint before purchasing is essential because the CLx cannot simply be installed using the RMR plate used by optics such as the Holosun 407C or 507C.
The CLx uses a crisp 3 MOA red dot with 10 brightness settings. This provides a balance between a relatively precise aiming point and quick reticle visibility. The sight also features 1 MOA adjustment increments and more than 60 MOA of total windage and elevation travel, giving users useful adjustment capability when zeroing.
One of the biggest differences between the CLx and traditional open emitter pistol optics is its enclosed housing. The emitter is sealed inside the optic, helping protect the reticle system from dust, rain, and debris. This can be particularly useful for users who want greater protection from environmental contamination without moving to a much larger enclosed optic.
The multi coated lens is designed to maximize light transmission and provide a clear sight picture. The compact 21 x 17 mm aperture keeps the optic relatively small, while its 1.61 inch length helps maintain a low profile suitable for compact handgun applications. An integrated backup rear iron sight is also included, providing an additional sighting option and allowing co-witnessing when the pistol’s configuration permits it.
AutoLive motion sensing provides automatic power management. The technology turns the dot on when movement is detected and switches it off during periods of stillness. This eliminates the need to manually manage the optic every time it is handled while helping conserve battery power.
Battery replacement is also convenient thanks to the side loading power tray. The battery can be accessed without removing the optic from the pistol, helping avoid unnecessary disruption to the optic’s zero. This is particularly useful for a sight that is intended to remain mounted for extended periods.
The CLx is constructed from 6061 T6 aluminum and weighs approximately 0.98 ounces. Its hardcoat anodized body is designed to be waterproof and shockproof while keeping the overall optic lightweight. For a Glock 19, this relatively low weight helps minimize the additional bulk added by an optic.
Primary Arms also backs the CLx with a Limited Lifetime Warranty covering manufacturer defects, materials, and workmanship. The warranty is transferable to subsequent owners without proof of purchase, providing additional reassurance for long term ownership.
Pros
- Enclosed emitter protects the reticle from dust, rain, and debris
- Shield RMSc footprint suits compatible compact pistol mounting systems
- 3 MOA red dot provides a balance of speed and precision
- 10 brightness settings provide useful illumination flexibility
- AutoLive motion sensing automatically activates and deactivates the dot
- Side loading battery tray allows battery replacement without removing the optic
- Enclosed design provides additional environmental protection
- Multi coated lens is designed to maximize light transmission
- Integrated backup rear iron sight supports co-witnessing when compatible
- Lightweight 0.98 ounce construction
- Durable 6061 T6 aluminum housing
- Waterproof and shockproof construction
- 1 MOA adjustment increments
- More than 60 MOA of total windage and elevation travel
- Primary Arms Limited Lifetime Warranty
Cons
- Shield RMSc footprint is not compatible with the standard Glock Gen 6 Plate #2 RMR adapter
The Primary Arms CLx Enclosed Reflex Sight is an attractive choice for the Glock 19 Gen 6 MOS if protection from environmental debris is a priority. Its enclosed emitter, lightweight 6061 T6 aluminum construction, waterproof and shockproof design, and compact dimensions make it particularly appealing for users looking for a compact enclosed optic.
Next read: 9 Best Red Dot Sight For Glock 19 gen 6
Factors To Consider When Choosing The Best Red Dot Sight For Glock 19 Gen 6 Mos
1. Footprint and Mounting Compatibility
The first factor to consider is the optic’s footprint because it determines whether the sight can be mounted directly or requires an adapter plate. The Glock 19 Gen 6 MOS uses a modular mounting system with adapter plates, so you should verify that the red dot’s footprint matches one of the available plates.
RMR pattern optics can use the appropriate factory plate, while RMSc pattern optics require a compatible RMSc plate. Confirming the footprint before buying prevents mounting problems and avoids unnecessary adapter combinations.
2. Reticle Size and Design
Reticle size has a major effect on how quickly you can locate the aiming point and how precise the sight picture appears. Smaller dots, such as 2 MOA or 3 MOA options, can provide a more precise aiming reference, while larger 6 MOA dots are generally easier to see quickly.
Some sights also offer a combination of a dot and circle or allow different reticle configurations. Your choice should depend on whether you prioritize a simple aiming point, rapid acquisition, or reticle versatility.
3. Battery Life and Power Management
Battery life is another important consideration, particularly if you plan to keep the optic mounted and ready for extended periods. Look for a sight with a long stated battery life and efficient power management features.
Motion activation can automatically turn the reticle on when movement is detected and put it into a low power state when inactive. Solar backup or automatic brightness adjustment can provide additional power management and reduce the need for frequent battery replacement.
4. Durability and Construction
A pistol mounted optic needs to withstand recoil, impacts, and everyday handling, so construction quality should be carefully considered. Aluminum housings, particularly those made from stronger grades such as 7075 T6, can provide a good combination of strength and weight.
It is also useful to check the optic’s shock or vibration resistance specifications. A durable housing helps protect the electronics and lens from the repeated stresses associated with pistol use.
5. Emitter and Weather Protection
Consider whether you prefer an open or enclosed emitter design. Open emitter sights generally provide a broad and unobstructed viewing area, but the emitter is more exposed to rain, dust, dirt, and other debris.
Enclosed emitter sights seal the emitter inside the housing, offering greater environmental protection. For users who expect to operate in challenging outdoor conditions, an enclosed design can be particularly attractive.
6. Window Size and Optical Clarity
The size and quality of the viewing window influence how easily you can locate the reticle and maintain a clear sight picture. A larger window can make reticle acquisition easier and provide a broader field of view, while a smaller window can help keep the optic compact.
Multi coated lenses can improve light transmission and reduce unwanted reflections. When comparing sights, consider both the physical window size and the quality of the lens coatings.
7. Brightness Controls and Visibility
A good red dot should provide enough brightness adjustment to remain visible across different lighting conditions. Multiple daylight settings allow the reticle to be tuned for bright outdoor conditions and lower light environments, while night vision compatible settings can be useful for users with compatible equipment.
Automatic brightness adjustment can also be convenient because it allows the optic to respond to changing ambient light. Make sure the reticle color and intensity are easy for you to see in the conditions where you expect to use the pistol.
8. Size, Weight, and Overall Profile
Finally, consider the optic’s physical dimensions and weight. A large optic may provide a bigger viewing window and additional durability, but it can add bulk to the Glock 19. A lightweight, compact sight can preserve the pistol’s relatively manageable profile and may be preferable for everyday carry or users who want minimal added weight.
Also check how far the optic extends beyond the slide and whether its height works well with your existing iron sights and preferred mounting configuration.
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Advantages Of Using A Red Dot Sight On Glock 19 Gen 6 Mos
1. Faster Target Acquisition
A red dot sight can make it easier to locate the aiming point because the illuminated reticle is visible directly within the optic’s viewing window. Instead of aligning multiple traditional sight elements, the shooter can focus on the target while placing the dot where they want the pistol to point. A properly selected optic with a clear window and suitable reticle size can make the sight picture more intuitive and easier to acquire.
2. Improved Aiming Precision
A red dot provides a distinct aiming reference that can help with precise shot placement. Smaller reticles, such as 2 MOA or 3 MOA dots, provide a fine aiming point, while larger reticles can offer easier visibility. The ability to choose different reticle sizes and configurations means users can select an aiming point that suits their preferences and intended application.
3. Easier Sight Alignment
Traditional iron sights require the front and rear sights to be aligned correctly before the pistol is aimed. A red dot simplifies this process by presenting a single illuminated aiming reference. This can make the sight picture less complicated and allows the shooter to concentrate more directly on maintaining the dot over the intended point of aim.
4. Better Performance in Different Lighting Conditions
Many modern red dot sights provide numerous brightness settings that allow the reticle to remain visible in bright sunlight, indoor environments, and lower light. Some models also include automatic brightness adjustment, while others offer night vision compatible settings. This flexibility can make the optic easier to use across changing lighting conditions.
5. Unlimited Eye Relief
A red dot sight provides unlimited eye relief, meaning the reticle can remain visible without requiring the eye to be positioned at one precise distance behind the optic. This gives the shooter more freedom in establishing a comfortable sight picture and can make the optic more forgiving of small changes in head position.
6. Improved Visibility for Different Reticle Preferences
The Glock 19 Gen 6 MOS can accommodate different types of pistol red dots, allowing users to select a reticle that matches their visual preferences. Some sights use a simple dot, while others offer combinations such as a dot and circle.
Green and other reticle colors are also available on some models, giving users additional choices when determining which aiming point is easiest for them to see.
7. Convenient Power Management
Modern red dots can include features such as Shake Awake or other motion sensing systems that automatically activate the optic when movement is detected and reduce power consumption during inactivity.
Some models also use solar assistance or automatic brightness adjustment. These features can reduce the amount of manual power management required while helping extend battery life.
8. Increased Protection From Environmental Conditions
Depending on the model selected, a red dot can provide useful protection against environmental conditions. Durable aluminum housings, waterproof ratings, shock resistance, and enclosed emitter designs can help protect the optic from rain, dust, debris, and repeated recoil. This makes choosing the appropriate construction particularly important for users who expect their Glock 19 Gen 6 MOS to encounter demanding conditions.
Best Red Dot Sight For Glock 19 Gen 6 Mos FAQs
1. What footprint should I look for when choosing a red dot for the Glock 19 Gen 6 MOS?
For the Glock 19 Gen 6 MOS, the RMR footprint is one of the most straightforward options because the pistol’s Plate #2 is designed for RMR pattern optics. This gives you access to a wide range of compatible sights without needing to modify the slide. Always verify the specific optic’s footprint and the plate supplied with your pistol before installation.
2. Is a 2 MOA, 3 MOA, or 6 MOA dot better for the Glock 19 Gen 6 MOS?
The best dot size depends on your priorities. A 2 MOA dot offers a finer aiming point, while a 3 MOA dot provides a useful balance between visibility and precision. A 6 MOA dot is larger and generally easier to see and acquire quickly. Glock also notes that larger dots tend to be easier to see at close range and in bright conditions, while smaller dots are better suited to longer distance and lower light.
3. Should I choose an open or enclosed emitter red dot for my Glock 19 Gen 6 MOS?
Both designs have advantages. An open emitter typically provides a broad viewing area and can keep the optic relatively compact, while an enclosed emitter protects the emitter from dust, rain, and debris. If environmental protection is a major priority, an enclosed design may be preferable.
If you prioritize a larger window and a more traditional open reflex format, an open emitter can be a better fit. The most important consideration is choosing a sight with the correct footprint and mounting plate for your Glock.
Conclusion
After comparing the top options, I find that the Best Red Dot Sights for Glock 19 Gen 6 MOS offer an excellent combination of mounting compatibility, clear reticles, durable construction, long battery life, and practical features for modern pistol use. RMR footprint optics are particularly convenient because they can work with the factory Gen 6 Plate #2, while other footprint options can be used with the appropriate adapter plate.
Features such as Shake Awake, Solar Failsafe, adjustable brightness, large viewing windows, and enclosed emitter protection can further improve convenience and reliability. Whether I prioritize a simple 2 MOA dot, a versatile circle and dot reticle, or an enclosed design for additional environmental protection, the right optic can complement the Glock 19 Gen 6 MOS and provide a more intuitive aiming experience.
Ultimately, I would choose a red dot based on the correct footprint, preferred reticle, durability, battery performance, size, and intended use to ensure the optic fits both the pistol and my personal requirements.