Choosing the 7 Best Holosun for Glock 17 can make a significant difference in how easily you acquire the aiming point and maintain a clear sight picture. Because the Glock 17 is a full-size pistol, it accommodates a broad selection of full-size pistol optics, and Holosun has several models designed specifically for this class of handgun. Options range from compact open-emitter sights to enclosed designs and competition-oriented optics.
The 7 Best Holosun for Glock 17 are particularly attractive because many models combine features such as Shake Awake, Solar Failsafe, long battery life, multiple reticle choices, and durable housings. Holosun’s 509 series provides an enclosed-emitter alternative for users who prefer additional protection around the emitter.
The 7 Best Holosun for Glock 17 ultimately depends on your Glock 17 configuration, intended use, preferred reticle, window size, and mounting system. Glock notes that certain Gen4 and Gen5 MOS models use the Modular Optic System, while the Holosun SCS-MOS is specifically designed for full-size Glock MOS pistols and mounts directly without an adapter plate. Always verify the exact optic and mounting compatibility for your pistol before purchasing.
7 Best Holosun for Glock 17
1. Holosun SCS-MOS Green Dot Sight
The Holosun SCS-MOS Green Dot Sight is our top overall choice for a Glock 17 MOS because it was specifically designed around full-size Glock MOS pistols. Unlike many conventional pistol optics that require an adapter plate, the SCS-MOS attaches directly to compatible Glock MOS slides. This gives it a low-profile configuration that works particularly well for shooters who want an optic that integrates neatly with the pistol.
One of the most attractive features of the SCS-MOS is its solar-charging system. Rather than relying on a conventional replaceable battery, the sight uses an internal rechargeable power source that can be replenished through exposure to light. Holosun states that the internal battery can provide substantial reserve power, potentially allowing the sight to operate indefinitely under suitable lighting conditions.
The optic also uses automatic brightness adjustment through its light sensors. This can make the sight convenient when moving between different lighting conditions because the optic can adjust the reticle brightness automatically. It also has an intensity override function and a low-power indicator, giving the user additional information about the sight’s power status.
Another advantage is its titanium housing. The SCS-MOS is rated IP68 and is designed to withstand substantial environmental exposure. Its compact dimensions and approximately 1.3-ounce weight also make it a relatively unobtrusive addition to a full-size pistol.
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Features
- Direct attachment for compatible Glock MOS systems
- Green reticle
- Solar charging
- Automatic brightness adjustment
- Titanium housing
- IP68 rating
- Approximately 1.3 oz
Pros
- Direct-mount design on compatible Glock MOS models
- Solar charging reduces dependence on replaceable batteries
- Low-profile design
- Durable titanium housing
- Automatic brightness adjustment
Cons
- Automatic brightness may not suit every user
2. Holosun HS507C X2 2 MOA Dot & 32 MOA Circle
The Holosun HS507C X2 2 MOA Dot & 32 MOA Circle is one of the most versatile choices in the lineup. It is an open-reflex pistol optic with Holosun’s Multi-Reticle System, allowing the user to select a 2 MOA dot, a 32 MOA circle, or a combination of the two. This flexibility makes the 507C X2 suitable for Glock 17 owners who want more than a single aiming-point option.
The 507C X2 uses a 7075-T6 aluminum housing and features a side-mounted CR1632 battery tray. The side-loading battery design is convenient because the battery can be accessed without removing the optic from its mounting position. Holosun rates the optic for up to 50,000 hours of battery life under specified conditions.
Solar Failsafe and Shake Awake are two of the model’s most useful electronic features. Solar Failsafe provides backup power support from available ambient light, while Shake Awake deactivates the LED when the optic remains motionless and reactivates it when movement is detected. These features are designed to balance readiness and battery conservation.
The sight has a 0.63 × 0.91-inch window, 12 brightness settings including two night-vision-compatible settings, and 1 MOA adjustment clicks. It is also IP67 rated and designed with unlimited eye relief and a parallax-free optical system.
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Features
- 2 MOA dot and 32 MOA circle
- Multi-Reticle System
- Solar Failsafe
- Shake Awake
- 7075-T6 aluminum housing
- Side-loading CR1632 battery
- IP67 rating
Pros
- Flexible reticle options
- Long battery life
- Solar backup
- Durable housing
- Convenient side battery tray
Cons
- Larger reticle can appear busy to some users
3. Holosun HE509T-RD X2 Enclosed Red Dot Sight
The Holosun HE509T-RD X2 Enclosed Red Dot Sight is the standout option for Glock 17 owners who prefer an enclosed-emitter design. Unlike an open-reflex optic, an enclosed optic places the emitter inside the sight housing, helping shield it from environmental exposure. Holosun identifies the 509T series as a titanium enclosed pistol-sight family.
The HE509T-RD X2 also incorporates Holosun’s Multi-Reticle System. Its available reticle configurations include a 2 MOA dot, 32 MOA circle, or combination reticle. This gives it similar reticle flexibility to the 507C while adding the benefits of an enclosed design.
The optic incorporates Solar Failsafe and Shake Awake technology. Holosun’s current 509 series is rated with up to 100,000 hours of battery life in dot-only operation under specified conditions, while offering 12 brightness settings with two night-vision-compatible settings.
Its titanium construction is another major selling point. Titanium provides a robust housing while keeping the optic relatively compact. The enclosed configuration also gives this model a distinctive advantage for users who place a high priority on protecting the emitter from dust, debris, and other environmental contamination.
The HE509T-RD X2 is therefore a premium choice rather than a budget option. It makes the most sense for Glock 17 owners who specifically want an enclosed optic and are willing to accept its additional cost and mounting considerations.
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Features
- Enclosed-emitter design
- 2 MOA dot and 32 MOA circle
- Titanium housing
- Solar Failsafe
- Shake Awake
- Multiple brightness settings
- IPX8-rated design
Pros
- Enclosed emitter
- Rugged titanium construction
- Flexible reticle system
- Excellent environmental protection
- Long battery life
Cons
- Heavier than some open-emitter options
4. Holosun HE508T-RD X2 2 MOA Dot & 32 MOA Circle
The Holosun HE508T-RD X2 2 MOA Dot & 32 MOA Circle is an excellent choice for Glock 17 owners who want a rugged open-emitter optic. It shares several important characteristics with the 507C series but uses a titanium housing, making it particularly attractive when durability is a priority. Holosun lists the HE508T-X2-RD as a titanium open pistol sight with the Multi-Reticle System.
The Multi-Reticle System gives the optic several aiming configurations. You can use the central 2 MOA dot alone, the 32 MOA circle alone, or the combined circle-and-dot configuration. This allows the sight picture to be adjusted according to personal preference.
Like several other Holosun pistol optics, the HE508T-RD X2 includes Solar Failsafe and Shake Awake. The optic uses a CR1632 battery and provides up to 50,000 hours of battery life under the manufacturer’s specified conditions.
The titanium housing is the feature that separates the 508T most clearly from the aluminum-bodied 507C. Holosun highlights Grade 5 titanium as a material used in its Elite-category optics because of its strength and fatigue resistance.
If durability is more important to you than getting the lowest possible price, the HE508T-RD X2 is an excellent upgrade. It offers the familiar open-reflex format while giving the Glock 17 a premium titanium optic.
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Features
- Titanium housing
- 2 MOA dot
- 32 MOA circle
- Multi-Reticle System
- Solar Failsafe
- Shake Awake
- CR1632 battery
Pros
- Strong titanium construction
- Flexible reticle
- Solar backup
- Long battery life
- Side-loading battery
Cons
- Higher cost
5. Holosun HS407C X2 2 MOA Red Dot Sight
The Holosun HS407C X2 2 MOA Red Dot Sight is a good choice for Glock 17 owners who prefer simplicity. Instead of offering multiple reticle configurations, the 407C X2 uses a straightforward 2 MOA dot. This can provide a clean sight picture without the additional circle found on the 507C. Holosun lists the HS407C X2 as an open pistol sight with a 2 MOA reticle.
The 407C X2 uses the same general open-pistol format as the 507C family and incorporates a 7075-T6 aluminum housing. It also has a side-mounted battery compartment, making battery replacement more convenient than designs where the optic has to be removed to access the battery.
Battery life is rated at up to 50,000 hours under specified conditions. The optic also incorporates Shake Awake, Solar Failsafe, 12 brightness settings, and a 0.63 × 0.91-inch window.
The simple 2 MOA dot is particularly appealing if you dislike complicated reticles. A smaller aiming point can provide a clean visual reference, while the full-size Glock 17 provides a stable platform for a pistol optic.
The HS407C X2 also tends to be a more economical choice than the premium 508T and 509T models. For Glock 17 owners who want the essential Holosun features without paying for a multi-reticle system, this is an excellent option.
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Features
- 2 MOA red dot
- 7075-T6 aluminum housing
- Solar Failsafe
- Shake Awake
- Side-loading battery
- Up to 50,000-hour battery life
- IP67 rating
Pros
- Simple, uncluttered reticle
- Long battery life
- Solar backup
- Durable aluminum housing
- Generally more affordable
Cons
- Smaller window than competition-focused optics
6. Holosun HS507C-X3 2 MOA Dot & 32 MOA Circle
The Holosun HS507C-X3 2 MOA Dot & 32 MOA Circle represents the newer generation of Holosun’s popular 507C family. It is designed for full-size pistol applications and continues the basic concept of combining a precise dot with a larger circle for a more versatile reticle presentation. Holosun’s current product lineup lists the 507C-X3 among its pistol sights.
The major attraction of the 507C family is its Multi-Reticle System. Depending on the model configuration, users can select the 2 MOA dot, 32 MOA circle, or combined circle-and-dot presentation. This gives the shooter more flexibility than a conventional single-dot optic.
The optic family also benefits from Holosun’s established electronics package. Features such as Shake Awake and Solar Failsafe are designed to extend battery efficiency and provide backup power support in appropriate lighting conditions.
The 507C format is well suited to a full-size Glock because it provides a useful combination of viewing area and compact dimensions. Its open design also keeps the overall optic relatively streamlined compared with many enclosed pistol sights.
For Glock 17 owners who want the newest version of the familiar 507C concept, the HS507C-X3 deserves consideration. It is particularly attractive if you like the established 507C format but want a current-generation model.
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Features
- 2 MOA dot
- 32 MOA circle
- Multi-Reticle System
- Shake Awake
- Solar Failsafe
- Open-reflex design
- Full-size pistol application
Pros
- Flexible reticle system
- Modern 507C design
- Good fit for full-size pistols
- Solar backup
- Long-running Holosun feature set
Cons
- Availability can vary by market
7. Holosun 507COMP 2 MOA Dot & Competition Reticle
The Holosun 507COMP 2 MOA Dot & Competition Reticle is designed around competition-style shooting and stands apart from the other optics on this list because of its exceptionally large viewing window. Holosun specifies a 1.1 × 0.87-inch objective lens and a Competition Reticle System designed to give the user multiple aiming configurations.
Its Competition Reticle System includes a precision 2 MOA dot together with 8, 20, and 32 MOA circle options. These combinations provide significantly more reticle flexibility than the standard 507C configuration.
The enlarged window is one of the most important characteristics of the 507COMP. A larger viewing area can make it easier to maintain a broad field of view while presenting the optic’s aiming point. This is especially appealing to users who prioritize competition-oriented features.
The 507COMP also includes Shake Awake, a long-rated battery life, IP67 protection, and 1 MOA windage and elevation adjustments. Holosun lists eight daylight brightness settings and two night-vision-compatible settings for the model.
The main tradeoff is size. The 507COMP is not necessarily the most streamlined choice for every Glock 17 setup. However, for a competition-focused Glock 17 where a large window and flexible competition reticle are priorities, it is an impressive option.
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Features
- Large 1.1 × 0.87-inch window
- 2 MOA dot
- 8/20/32 MOA circles
- Competition Reticle System
- Shake Awake
- Up to 50,000-hour battery life
- IP67 rating
Pros
- Very large viewing window
- Excellent reticle flexibility
- Competition-oriented design
- Long battery life
- Shake Awake
Cons
- Larger than conventional pistol optics
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Factors to Consider When Choosing the 7 Best Holosun for Glock 17
Mounting Footprint
The mounting footprint is critical. Many Holosun C-series pistol optics use the RMR footprint, while the 509T uses a different mounting arrangement. The SCS-MOS is designed specifically for compatible Glock MOS slides and attaches directly without an adapter plate. Always confirm the footprint and plate requirements before purchasing.
Reticle Type
Consider whether you prefer a simple dot or a multi-reticle system. The 407C provides a 2 MOA dot, while the 507C and 508T offer a 2 MOA dot and 32 MOA circle configuration. The 507COMP goes further with its competition-oriented 8, 20 and 32 MOA circles.
Battery System
Battery life is another important consideration. Many Holosun models offer long battery life, while features such as Shake Awake and Solar Failsafe can help manage power. The SCS-MOS takes a different approach with its internal rechargeable power system and solar charging.
Window Size
A larger window can provide a more expansive sight picture, but it can also result in a larger optic. The 507COMP is particularly notable for its enlarged 1.1 × 0.87-inch objective window.
Durability
Consider the housing material and environmental rating. The 507C and 407C use 7075-T6 aluminum, while the 508T and 509T use titanium housings. The appropriate choice depends on how much emphasis you place on rugged construction and environmental resistance.
FAQs about the 7 Best Holosun for Glock 17
- What is the best Holosun for a Glock 17?
The Holosun SCS-MOS is our Best Overall choice for a compatible Glock 17 MOS because it is specifically designed for full-size Glock MOS systems and offers direct mounting, solar charging, automatic brightness adjustment, and a low-profile design.
- What is the difference between the Holosun 407C and 507C?
The main difference is the reticle system. The 407C uses a simple 2 MOA dot, while the 507C adds Holosun’s Multi-Reticle System with a 2 MOA dot and 32 MOA circle options.
- Is the Holosun SCS-MOS compatible with every Glock 17?
No. The SCS-MOS is designed for compatible full-size Glock MOS systems. A standard Glock 17 without the appropriate optic-ready configuration will require a different mounting solution or optic.
Conclusion
The 7 Best Holosun for Glock 17 offers a wide range of red dot sights that can complement the Glock 17, from straightforward dot-only optics to sophisticated multi-reticle and enclosed-emitter designs. Before choosing any optic, confirm your exact Glock 17 generation, MOS configuration, mounting footprint, adapter-plate requirements, and the optic’s dimensions. With those factors verified, choosing among these seven Holosun models becomes much easier.