Holosun 509T Review – The Best Enclosed MRS Sight? (2024)

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Holosun 509T

Overall Score 7.8

Tested With Scoring System 2.0

Optical Quality
Durability and Build Quality
Weight and Size
Battery Life
Ease of Use

Learn How I Test & Score Here

⭐️ Verdict: Enclosed MRS Sight (7.8)

As a shooter who’s rigorously tested the Holosun 509T, I’ve found it to be a robust addition to my pistol. The sight, with its Titanium housing and Super LED, promises longevity and reliability. It’s equipped with features like the Multi-Reticle System, Solar Failsafe, and the innovative Shake Awake Technology, making it a standout choice.

During my testing, I put the Holosun 509T through a series of demanding conditions, including drop tests from shoulder height and exposure to various weather conditions. The optic’s performance was consistent, maintaining its zero impressively. It’s designed to handle real-world wear and tear, proving itself as a sturdy and dependable optic.


Titanium housing

Super LED

Multi-Reticle System

Solar Failsafe

Shake Awake Technology

Easy battery replacement


Windage and elevation adjustments require a specific tool

Some minor delamination noted after extensive testing

The rear lens protection could be improved.

Price Comparison

Available at 2 shops 
Optics Planet
Primary Arms

The 509T promises a Titanium housing and Holosun’s exclusive Super LED technology, boasting up to 50,000 hours of battery life. 

It also features a Multi-Reticle System, Solar Failsafe, and the innovative Shake Awake Technology. 

However, while it excels in battery life and durability, there are areas where it falls slightly short, such as the necessity of a special tool for windage and elevation adjustments, which might be a minor inconvenience for some users.

Performance Review of Holosun 509T 

1. Optical Quality

The optical quality of the Holosun 509T is a critical aspect of its performance. 

The sight promises clear visibility with a 2 MOA dot and a 32 MOA circle, which is ideal for a variety of shooting conditions. 

On testing, the clarity and brightness of the reticle were commendable, especially in varying light conditions, thanks to the Solar Failsafe and multiple brightness settings.

However, while the product boasts a parallax-free experience, it’s important to note that no optic is completely free of parallax. 

In practical use, this was barely noticeable, but it’s a point where the marketing slightly overpromises. 

Compared to other sights in the market, the 509T holds its own, especially considering its price point. 

The durability, courtesy of the Titanium housing, is a significant advantage, making it a reliable choice for both casual and professional shooting.

In terms of user experience, the Shake Awake Technology is a standout feature, extending battery life effectively.

Score: 8/10

2. Durability and Build Quality

In the realm of reflex sights, the durability and build quality of the Holosun 509T stand out. 

Its Titanium housing not only promises but delivers a robustness that’s essential for heavy-duty use. 

This is a sight built to withstand the rigors of both recreational shooting and professional use. The promise of a durable build is not just marketing fluff; it translates effectively into real-world resilience.

During my tests, the 509T faced various challenging conditions. 

Its performance in drop tests from shoulder height, particularly, was impressive, sustaining no loss in functionality. 

This durability is a significant advantage over many competitors, who often compromise on build quality. 

The sight showed some signs of wear, particularly delamination on the solar panel and minor damage to the back ledge, suggesting that while the internal components are solid, the exterior could benefit from additional reinforcement.

As a shooter, feeling confident in your equipment’s resilience is crucial, and the 509T instills this confidence.

However, the need for minor improvements in protecting external components is evident. These aspects, though not deal-breakers, are critical for a holistic understanding of the product’s longevity.

Score: 7/10

3. Weight and Size

The Holosun 509T excels in its compact and lightweight design, making it a comfortable and unobtrusive addition to a pistol. 

Weighing just 1.76 ounces and measuring 4.75 x 3.75 x 3 inches, it’s evident that Holosun has put considerable thought into making the 509T as user-friendly as possible. 

This is particularly important for a reflex sight, where any additional weight or bulk could affect the handling of the firearm.

In practice, the compact size and light weight of the 509T make it ideal for various shooting scenarios, from tactical applications to sport shooting. 

Its unobtrusive nature means it doesn’t hinder the balance or handling of the pistol. This is a significant advantage over some competitors, which can feel bulky or overly heavy.

However, it’s worth noting that while the compact size is generally beneficial, it may present challenges for shooters with larger hands or those who prefer a larger window size for sighting. 

This is a subjective preference, but one worth considering depending on your shooting style and comfort.

In my experience, the balance the 509T strikes between compact size and functionality is commendable.

Weight1.76 Ounces
Length4.75 Inches
Width3.75 Inches
Height3 Inches

Score: 8/10

4. Battery Life

The Holosun 509T’s battery life is a standout feature, with the brand promising up to 50,000 hours on a single CR1632 battery. 

The addition of Solar Failsafe technology further enhances the battery life, ensuring the optic remains functional even when the primary power source is depleted. 

This dual power source system sets the 509T apart in the market, offering a level of reliability and longevity that many competitors struggle to match.

From a professional shooter’s perspective, the peace of mind offered by such an extended battery life cannot be overstated. 

It reduces the need for frequent battery changes and the worry of the sight failing at critical moments. 

The Holosun 509T overperforms in this criterion, making it a highly reliable option for both recreational and professional use.

Score: 9/10

5. Reticle

The Holosun 509T’s reticle design is innovative and versatile, offering a 2 MOA dot and a 32 MOA circle. 

This Multi-Reticle System (MRS) allows for quick adjustments between a more precise aim or a broader view, depending on the shooting scenario. 

The option to deactivate the larger circle for a simpler sight picture is a thoughtful touch, catering to different shooter preferences.

In terms of performance, the reticle’s clarity and brightness are exceptional, with adjustments for different lighting conditions being both intuitive and effective.

However, it’s important to note that while the sight is marketed as parallax-free, complete parallax elimination is nearly impossible to achieve. 

This discrepancy between marketing and reality is minor but noticeable in certain shooting conditions.

Comparatively, the 509T holds its own against other market options, especially considering its price point. 

The flexibility offered by the MRS adds significant value, allowing for a range of shooting experiences.

My personal experience with the reticle’s performance has been largely positive, with its clear visibility and ease of use being major benefits. 

The only problem would be the aforementioned slight parallax, which may affect shooters aiming for extreme precision.

Score: 8.5/10

6. Ease of Use

The Holosun 509T scores high in ease of use, a critical factor for any shooter, whether novice or experienced. 

Its intuitive design shines through, with large and easily accessible adjustment buttons for dot intensity, a feature that enhances the user experience significantly. 

The incorporation of the Multi-Reticle System (MRS) allows for quick reticle changes, catering to various shooting conditions and preferences, which is a significant advantage.

The requirement of a specific tool for windage and elevation adjustments can be a point of inconvenience, especially in situations where quick adjustments are needed. 

This necessity might not be a deal-breaker, but it does add an extra step in the process, potentially slowing down the user.

Overall, the Holosun 509T demonstrates an excellent balance between advanced features and user-friendly operation, though it could benefit from simplifying some aspects of its design.

Score: 7/10

7. Price

Considering the features it packs; a robust Titanium housing, advanced battery life, and versatile reticle options; the price point is quite reasonable.

In comparison to other red dot sights in its category, the 509T offers a compelling package of durability, performance, and advanced features, often surpassing more expensive options. 

From a shooter’s perspective, investing in the 509T is a wise decision, particularly for those seeking a high-quality sight without overspending. 

The balance of cost and performance makes it an attractive option for a wide range of users.

In conclusion, the Holosun 509T represents a smart purchase, offering high-end features at a mid-range price, making it a value-packed option in the reflex sight market.

Score: 7/10

Types of Guns Suitable for This Sight

Final Verdict

After thorough testing, the Holosun 509T Reflex Sight stands out as a robust and reliable option for both recreational and professional shooters. 

Its Titanium housing and up to 50,000 hours of battery life, thanks to the Super LED technology, make it a durable choice. 

The Multi-Reticle System, Solar Failsafe, and Shake Awake Technology add layers of versatility and convenience. 

Weighing the pros and cons, the Holosun 509T scores high in most aspects, making it a worthwhile investment for those seeking quality and reliability in a reflex sight.

Know Whats the difference between Holosun 508t Vs 509t.


How long does the battery last in the 509T?

The battery in the Holosun 509T can last up to 50,000 hours, providing extended use and reliability.

What footprint does the Holosun 509T have?

The Holosun 509T features a unique footprint, compatible with adapters designed for the Picatinny rail system.

What battery does Holosun 509T take?

The Holosun 509T uses a CR1632 Lithium battery, complemented by its Solar Fail Safe™ dual power system.

Is the Holosun 509T parallax free?

While the Holosun 509T is marketed as parallax-free, it’s important to note that no optic can be completely free of parallax, although this is minimally noticeable in the 509T.

Whats the difference between Holosun 509t vs Trijicon RMR?

The Holosun 509T features a titanium housing, multiple reticle options, a solar-powered battery with up to 5 years of life, and a lower price point. The Trijicon RMR, in contrast, has an aluminum housing, a single 3.25 MOA reticle, a 4-year battery life, and is generally more expensive.

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