5 Best Red Dot Sights for the Stoeger STR-9S Pistol

Chris G.

I have a deep appreciation for the Stoeger STR-9S. It’s inspired by the well-established Glock design, but it isn’t a Glock clone. This striker-fired, polymer-frame 9mm handgun has been one of my favorites in my handgun collection.

Thus, it deserves special accessories, including red dot sights. I believe I found 5 that have not only proven their worth in terms of functionality but have also left an indelible mark on my shooting experience.

I will delve into the intricacies of each red dot sight, sharing my firsthand experiences and shedding light on the distinctive features that set them apart. 

Best Red Dot Sight Options for the Stoeger STR-9S Pistol

I’ve narrowed down my suggestions to five top contenders: the HOLOSUN HS507K-X2, HOLOSUN HS407C-X2, Truglo Tru-Tec, Vortex Viper, and Vortex Venom. Each of these options has unique features and advantages, which I’ll discuss in detail to help you make an informed decision.

For this test, I used a stock Stoeger STR-9S with no modifications. I usually attach my tactical light below the barrel and, sometimes, a suppressor.  But I removed the accessories for the purity of this test and review. 

1. HOLOSUN HS507K-X2: Best Choice

For me, the HOLOSUN HS507K-X2 stands out as the best choice for a red dot sight for the Stoeger STR-9S pistol. This sight is compact and lightweight, making it a perfect match for the STR-9S. It enhances precision without adding unnecessary bulk.

Why I Recommend It

The HS507K-X2 features a multiple reticle system, increasing versatility in target acquisition. With a window size of 0.58′ x 0.77′, it offers a clear sight picture, which is crucial for fast and accurate shots. I am aware of my surroundings even if I’m focused on my target.

The HS507K-X2 is impressive, boasting an IP67 waterproof rating. Its battery life is remarkable, lasting for 50,000 hours. Additionally, the side access makes it easy to replace the battery.

The advanced Shake Awake technology ensures immediate activation, while the user-friendly buttons allow for quick brightness adjustments.

All these features make the HS507K-X2 a reliable and easy-to-use choice for shooting at a mastery level.

Technical Specifications

Reticle: 2 MOA Dot and 32 MOA Circle
Light Wavelength: 650nm
Reticle Color: Red
Parallax Free: Yes
Unlimited Eye Relief: Yes
Magnification: 1x
Multi-Coatings: Yes
Power Source: Battery
Battery Type: CR1632
Battery Life: 50,000 hours
Brightness Setting: 10 Daylight and 2 Night-vision compatible
Window Size: 0.63 x 0.91 inches
Dimension: 1.78 x 1.15 x 1.15 inches
Weight: 1.5 oz.
Housing Material: 7075 T6 Aluminum
Surface Finish: Anodize
Adjustment per Click: 1 MOA
Wind and Elevation Travel Range: ±50 MOA
Submersion Rating: IP67
Vibration: 5000 G

2. HOLOSUN HS407C-X2: Fast Target Acquisition

“I feel the need. The need for speed.” If this popular Top Gun quote is your motto in the range, then you should install the HOLOSUN HS407C-X2 for your Stoeger STR-9S pistol. 

Why I Recommend It

Light and durable, the HOLOSUN HS407C-X2 is built to maximize target acquisition speed. The 2MOA red dot provides precise aiming, ensuring accurate shots every time. A multi-coated lens reduces glare and distortion. The red dot sight is parallax-free and offers unlimited eye relief.

But that’s not all. The HOLOSUN HS407C-X2 features a Solar Failsafe technology that does two functions: one, it automatically adjusts the brightness of the reticule depending on ambient lighting conditions, and two, it powers up the red sight dot even when the battery fails.

The main power system itself is not something to underestimate.  With an impressive battery life of 50,000 hours, this sight will last for extensive use. It also incorporates Shake Awake technology, instantly activating the sight and maximizing battery life.

The Lock Mode feature is one of the big pluses of the HS407C-X2. It prevents unintended changes due to recoil, fast movement, accidental drops, and other factors to your settings.

Based on my experience, the HS407C-X2 is a dependable and high-performance sight that perfectly complements the Stoeger STR-9S pistol.

Technical Specifications

Reticle: 2 MOA Dot
Light Wavelength: 650nm
Reticle Color: Red
Parallax Free: Yes
Unlimited Eye Relief: Yes
Magnification: 1x
Multi-Coatings: Yes
Power Source: Solar and Battery
Battery Type: CR1632
Battery Life: 50,000 hours
Brightness Setting: 10 daylight and  2 night vision compatible
Window Size: 0.63 x 0.91 inches
Dimension: 1.78 x 1.15 x 1.15 inches
Weight: 1.5 oz.
Housing Material: 7075 T6 Aluminum
Surface Finish: Anodized
Adjustment per Click: 1 MOA
W&E Travel Range: ±50 MOA
Storage Temperature: -40℃~70℃
Working Temperature: -30℃~60℃
Submersion: IP67
Vibration: 5000G

3. Truglo Tru-Tec: Money Saver Optics

You’re tightening your belt. But you don’t have to sacrifice quality. Check out the Truglo Tru-Tec, an affordable red dot sight that’s perfect for your Stoeger STR-9S pistol.

Why I Recommend It

The Tru-Tec provides a wide sight window measuring 23mm x 17mm, allowing for quick target acquisition. It’s made from high-quality aircraft-grade aluminum, ensuring a compact, durable, and water-resistant design. 

Rather than knobs, the Tru Tec utilizes digital push-button brightness controls to adjust illumination. Locking windage and elevation adjustments prevent your settings from changing even in the midst of the most rigorous movement.

The 3-MOA dot reticle is sharp, and the sight remains parallax-free beyond 30 yards. The Tru-Tec features a locking windage and elevation adjustment, which is particularly useful for precision shooting.

Replacing the battery requires removing the red dot from your pistol. However, users generally find the mounting process easy and report good battery life. Its auto-off feature helps lengthen battery life.

Technical Specifications

Lens size: 23mm x 17mm
Reticle: 3-MOA Red-Dot
Material: CNC-machined from aircraft-grade aluminum
Mounting options: 4-post mount, RMR, Picatinny/Weaver 45-degree offset
Brightness settings: 10 brightness settings
Weight: 1 oz
Picatinny / Weaver rail mount: included

4. Vortex Viper: Great Value for Money: Good Value for Money

Let’s take a closer look at the features of the Vortex Viper, a red dot sight that offers excellent value for its price and is a great choice for the Stoeger STR-9S pistol.

Why I Recommend It

The Viper is known for its simplicity and speed, making it perfect for fast-paced shooting situations.  It has a low mounting height, which is ideal for handguns with cutout slides. The design allows it to co-witness with suppressor-height iron sights. It features a bright red 6 MOA dot that’s easy to see in daylight even in bright conditions.

The sight is built to withstand recoil and impact. Thus, you can take it in during your most rigorous shooting sessions. The Viper also has an impressive battery life of up to 30,000 hours on lower settings.

Technical Specifications

Magnification: 1x
Reticle: 6 MOA Dot
Adjustment Graduation: 1 MOA
Parallax Setting: Parallax Free
Max Windage Adjustment: 120 MOA
Max Elevation Adjustment: 120 MOA
Dot Color: Bright Red
Dot Size: 6 MOA
Mount Type: Weaver/Picatinny
Eye Relief: Unlimited
Length: 1.8 inches
Weight: 1.03 oz

5. Vortex Venom: For Exceptional Durability

Finally, I recommend the Vortex Venom if you have a heavy hand or if you want to ensure reliable performance even in extreme circumstances.

Why I Recommend It

The Vortex Venom is known for its durability and is highly suitable for the Stoeger STR-9S Pistol. Its ArmorTek ultra-hard aluminum housing is lightweight and durable while its large fully multi-coated, scratch-resistant lens provides a wide field of view.

With ten brightness levels and an auto mode, the Venom offers customizable visibility. It also features 1 MOA windage and elevation adjustments, making it easy to zero in on your target. The top load system allows for convenient battery replacement.

Users have praised the Venom’s build quality, glass clarity, dot visibility, and accuracy. However, it’s worth noting that there may be compatibility issues, so some modifications might be necessary. The sight is also on the heavier side. 

Vortex Optics Venom Red Dot Sight – 3 MOA Dot
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Technical Specifications

Reticle: 3 MOA Dot
Reticle Color: Red
Power Source: 1 x CR1632
Runtime: 550 Hours
Mounting: Picatinny / Weaver
Magnification: 1x
Impact Point Correction: 1 MOA
Windage Adjustment: 130 MOA
Elevation Adjustment: 100 MOA
Water Resistance: Waterproof
Dimensions: 1.9 x 1.1 x 1.0 inches
Weight: 1.6 oz 

Choosing the Right Red Dot Sight for Your Stoeger STR-9S

When it comes to selecting a red dot sight for your Stoeger STR-9S, it’s important to consider your specific shooting needs. I’ve discovered that the best sight isn’t always the most expensive one; it’s the one that suits your requirements. Let’s keep a few factors in mind.

  1. Mounting Options
    • Check the mounting options available for your Stoeger STR-9S. Some pistols may have specific mounting systems or accessory rails. Ensure that the red dot sight you choose is compatible with the mounting system on your pistol.
  2. Size and Weight
    • Consider the size and weight of the red dot sight. A compact and lightweight sight is usually preferable for a pistol to maintain a balanced and ergonomic feel. It should not add too much bulk or weight to your handgun.
  3. Reticle Type
    • Choose a reticle type that suits your shooting needs. Common reticle types include dot, circle dot, and holographic. Some shooters prefer a simple dot, while others find a circle dot or other reticle patterns more helpful for quick target acquisition.
  4. Brightness Settings
    • Opt for a red dot sight with adjustable brightness settings. This feature is crucial for adapting to different lighting conditions. Ensure that the sight has a wide range of brightness levels, including both low-light and bright-daylight settings.
  5. Battery Life
    • Check the battery life of the red dot sight. A longer battery life is desirable, especially if you plan to use the sight for extended periods without changing the battery. Some models come with energy-saving features or automatic shut-off to conserve battery life.
  6. Durability and Construction
    • Look for a sight with a rugged and durable construction. Since pistols can experience recoil, it’s essential that the sight is built to withstand the shock and vibrations. Water and shock resistance are also important features, especially if you plan to use the pistol in various conditions

Furthermore, the lens is an important consideration when choosing a red dot sight for your Stoeger STR-9S pistol. The lens size, often referred to as the objective lens diameter, can impact factors such as field of view, light transmission, and overall sight size. Here’s how lens size can be a factor in your decision:

  1. Field of View
    • A larger objective lens diameter generally provides a wider field of view. A wider field of view can be advantageous for situational awareness, allowing you to see more of your surroundings and potential targets.
  2. Light Transmission
    • A larger objective lens can also allow more light to enter the sight, which can be beneficial in low-light conditions. This can improve the sight’s performance in environments with limited lighting.
  3. Sight Size and Weight
    • While a larger lens may offer certain advantages, it also contributes to the overall size and weight of the red dot sight. Consider the balance between a larger lens for improved visibility and the desire for a compact and lightweight setup on your pistol.
  4. Housing Size
    • The size of the lens can influence the overall size of the sight housing. Some shooters prefer a more compact design for easier holstering and handling, while others prioritize a larger lens for enhanced target acquisition.
  5. Target Engagement Distance
    • Consider the typical engagement distance for your shooting activities. A larger lens may be more beneficial for longer-range shooting, while a smaller lens might be adequate for closer engagements.

Other Contenders

Not contented with my recommendations above? Well, let’s explore some other red dot sights that are worth considering:

  1. Trijicon RMR (Ruggedized Miniature Reflex): The Trijicon RMR is known for its rugged construction and is widely used by both military and law enforcement. It comes in various models, including adjustable LED and dual-illuminated versions.
  2. Aimpoint Acro P-1: The Aimpoint Acro P-1 is a compact and durable red dot sight designed for pistols. It features a 3.5 MOA dot and is known for its reliability and robust construction.
  3. Leupold DeltaPoint Pro: The DeltaPoint Pro from Leupold is a popular choice for handguns. It offers a wide field of view, motion sensor technology, and a rugged aluminum housing. It comes with a 2.5 MOA dot.
  4. Burris FastFire 3: The Burris FastFire 3 is a compact and lightweight sight with a 3 MOA dot. It’s known for its affordability and durability, making it a good option for those on a budget.
  5. SIG Sauer ROMEO1: The SIG Sauer ROMEO1 is a compact red dot sight designed for pistols. It features a 3 MOA dot, motion-activated illumination, and durable construction.
  6. Crimson Trace CTS-1400: The CTS-1400 is a compact open reflex sight from Crimson Trace. It offers a wide field of view, a 3.25 MOA round aiming dot, and adjustable brightness settings.
  7. Bushnell RXS-100: The Bushnell RXS-100 is a budget-friendly red dot sight with a 4 MOA dot. It features a compact design, long battery life, and is suitable for a variety of firearms, including pistols.


So, there you have it. My overall favorite is the HOLOSUN HS507K-X2, but the others are not a far way off. Whether you’re on a budget with the Truglo Tru-Tec, looking for a compact option like the HOLOSUN HS507K-X2, or prioritizing durability with the Vortex Viper, there’s a red dot sight out there for your Stoeger STR-9S.

It’s all about finding the right balance between precision, speed, and price. With these top picks, you’re one step closer to improving your shooting accuracy and overall experience.

About the author

The name's Chris. Just a regular dude who loves firearms. I've been shooting since I was a kid. My old man taught me the ropes.

I'll never forget the first time I missed an easy shot on a buck, thanks to a bum scope. The image was fuzzier than my dog's butt. After that, I got obsessed with understanding scopes. What makes the good ones tick and the bad ones trash. After a few years and a few thousand bucks, I learned what separates the winners from the losers. Once I had a good stockpile of knowledge, I launched this site.

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