4 Best Red Dot Sights for the SIG SAUER P322 Pistol

Chris G.

If you’re like me and find yourself drawn to the sleek and compact design of the SIG SAUR P322 pistol, you know that finding the right accessories can make all the difference in optimizing your shooting experience. Red dot sights level up your speed, precision, and accuracy whether it’s for sport, law enforcement, or home defense.

Today, I’m excited to guide you through my top picks for red dot sights specifically tailored for the Sig P322. I’ll thoroughly analyze the top-performing red dot sights for the Sig P322 pistol. I’ll also delve into technical specifications and key features of my picks. 

What Are the Best Red Dot Sights for the Sig P322 Pistol

I consider my SIG Sauer P322 pistol a special firearm. Thus, it deserves special accessories. Here are some of my top options when it comes to red dot optics. I tested all these in the local range.

  • The Holosun HS507K-X2 is known for its exceptional accuracy.
  • The Sig Sauer Romeo Zero Elite is praised for its crystal-clear optics.
  • The Swampfox Sentinel is renowned for its outstanding durability.
  • Holosun EPS Carry, which features a unique enclosed emitter design.

My SIG Sauer P322 is mostly stock built. However, I did upgrade my trigger using an Armory Craft SIG Sauer P322 Flat Adjustable Flat Trigger for a smoother pull. During night testing, I attached a Streamlight TLR1 Tactical Light on the front bottom rail. Thus, my P322 was slightly heavier at the front during these tests.

1. HOLOSUN HS507K-X2: Unmatched Accuracy

For my Sig P322 Pistol, my go-to is the HOLOSUN HS507K-X2.  It is engineered for exceptional accuracy.

The multi-reticle system with a red 2 MOA dot and a 32 MOA circle allows me to precisely aim at targets in various distances and scenarios. It is designed to be parallax-free so that the reticle stays on target regardless of eye position. The reticule has 10 daylight brightness settings and 2 night-vision compatible to ensure continued visibility at all times. Finally, its clear multi-coated lens prevents image distortion, improving my shooting accuracy. 

The Shake Awake technology is an innovative feature that conserves battery life by deactivating the LED when not in use, providing up to 50,000 hours of battery life.

Although there have been some installation issues with certain firearm models, the HS507K-X2 remains a top choice due to its overall performance, adaptability, and durability.

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: 0.63×0.91 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: 5000G

Special Features

  1. Multiple Reticle Options: Many red dot sights, including those from HOLOSUN, offer various reticle options such as dot, circle-dot, and circle with a dot. These can provide flexibility for different shooting scenarios.
  2. Shake Awake Technology: This feature activates the sight upon sensing motion and puts it to sleep when stationary. This helps to conserve battery life.
  3. Durable Construction: HOLOSUN sights often have rugged construction, including durable materials and shock-resistant features to withstand recoil and harsh environmental conditions.
  4. Multiple Brightness Settings: Adjustable brightness settings allow users to adapt the sight to different lighting conditions, ensuring optimal visibility.
  5. Mounting Options: The HS507K-X2 may offer various mounting options, including compatibility with popular mounting systems for ease of installation on the Sig P322 Pistol.

2. SIG SAUER Romeo Zero Elite: Crystal Clarity

The SIG SAUER RomeoZero Elite is a high-quality red dot sight designed specifically for Sig P322 pistol users. This compact sight is another one of my favorites because it offers impressive clarity and precision.

Its aspherical glass lens with zero distortion provides a crystal-clear sight picture and excellent light transmission, allowing me to see the target as well as the surroundings. The sight also offers touch-activated programming (TAP) for easy reticle and brightness adjustments. In low-light conditions, the rear backup sight notch, filled with Swiss SuperLuminova, guarantees optimal visibility. The reticle emitter features 8 daylight brightness settings.

It also has a rear-positioned backup sight notch with Grade A Swiss SuperLuminova for shooting in low light conditions.

Featuring a carbon-infused weapons-grade ultralight polymer housing, the RomeoZero Elite ensures durability and shock resistance. I’ve dropped my pistol a couple of times with the Romeo Zero attached; the sight never showed damage in any way. Additionally, the RomeoZero Elite boasts an extended runtime of up to 20,000 hours, ensuring reliable performance.

Technical Specifications

RX Footprint: Compact (Shield RMS-c)
Color: Black
Magnification: 1x
Objective Lens Diameter: 24 mm
Battery: 1 CR1632
Reticle: 2 MOA Red Dot / 32 MOA Circle
Overall Length: 1.6 in
Overall Width: 1 in 
Height: 0.98 in
Weight: 0.5 oz
Illumination Settings: 8 Daytime
Run Time: 20000 hrs

Special Features

  1. Compact Design: The Romeo Zero Elite is compact and lightweight design, making it suitable for small pistols or concealed carry.
  2. Motion Activated Illumination (MOTAC): The RomeoZero Elite features MOTAC technology, which turns the illumination on when motion is detected and powers it down during periods of inactivity to conserve battery life.
  3. Multiple Reticle Options: The sight has 2 reticle options to suit different preferences and shooting scenarios.
  4. Lens Coatings: High-quality lens coatings are used to enhance light transmission, reduce glare, and provide a clear and crisp sight picture. The coatings are also anti-reflective.
  5. Adjustable Brightness Settings: The sight includes 8 daylight brightness settings.
  6. Rugged Construction: SIG SAUER optics are known for their durability, with features like shock-resistant construction and waterproofing to withstand harsh conditions.

3. Swampfox Sentinel Micro Red Dot: Incredibly Durable

If you love a compact and durable red dot sight, then you’ll get the best of both worlds with the Swampfox Sentinel micro red dot.

Constructed from 7075 aircraft-grade aluminum, the Swampfox Sentinel Micro Reflex RED DOT offers Sig P322 pistol users a compact and reliable red dot sight solution. This model is designed to withstand regular use, ensuring its longevity. Made from 7075 aluminum, it features a low-profile lens hood and Ironsides Shield for strong lens protection. 

The Sentinel’s compact size and extended battery life, thanks to its CR2032 battery, add to its appeal.

With a 3 MOA red dot reticle projected on a 16mm window, it provides precise targeting. However, my particular unit has issues with mounting screws and glare on the glass. For better performance, I recommend choosing the manual brightness model over the auto brightness model.

Technical Specifications

MOA Adjustment: Dial
Dot Size: 3 MOA
Magnification: 1x
Lens Diameter: 16mm
Illumination Positions: Sentinel-M: 10 / Sentinel-A: Continuous adjustment
Brightness Adjustments: Sentinel-M: Up/Down Digital Press / Sentinel-A: Photosensitive sensor
Shockproof G Forces: 1500Gs
Waterproof: 1 Meter / IPX7-rated
Battery Type: CR 2032
Max Battery Life: approximately 2 years
Dimensions: 1.61 X 0.91 X 0.94 inches
Weight: 0.62 oz
Specialty Coatings: Anti-fog, hydrophobic, anti-scratch
Parallax: Parallax free at 33 yards
Eye Relief: Unlimited
Mount Type: RMSc footprint
Chassis: 7075 Aircraft-grade aluminum
Windage/Elevation Movement Range (MOA): +/- 35 MOA/ Total 70 MOA Range

Special Features

  1. Compact and Lightweight Design: The Swampfox Sentinel has an extremely compact and lightweight build to reduce added weight to the firearm.
  2. Adjustable Brightness Settings: The ability to adjust the brightness of the reticle is important for adapting to various lighting conditions.
  3. Durable Construction: Although small, the Swampfox Sentinel is incredibly robust. It can easily withstand recoil and harsh environmental conditions. 
  4. Coated Lenses: This red dot’s high-quality lens coatings enhance light transmission, reduce glare, and provide a clear and crisp sight picture without any distraction.

4. Holosun EPS Carry: Enclosed Emitter

The Holosun EPS Carry is a strong competitor in the market of red dot sights for the Sig P322 pistol. 

The Holosun EPS Carry offers several noteworthy features. It has an enclosed emitter design that ensures superior performance in adverse environments. This feature makes it an excellent choice for practical shooting.  It has a multi-reticle system with a 2 MOA dot and a 32 MOA circle. The housing of the sight is made of light but robust 7075 T6 aluminum. Users will appreciate the easy-access battery door and simple brightness adjustment for added convenience.

With its sturdy construction and impressive features, the Holosun EPS Carry is undoubtedly a top choice for the Sig P322 pistol.

Technical Specifications

Reticle: 2 MOA Dot/ 32 MOA Circle-Dot
Reticle Color: Red
Eye Relief: Unlimited
Power Source: 1 x CR1620
Runtime: 50,000 Hours
Sight Window Dimensions: 0.6 x 0.8 inches
Magnification: 1x
Anti-Reflective Coatings: Multicoated
Impact Point Correction: 1.5 MOA
Windage Adjustment: ±30 MOA
Elevation Adjustment: ±30 MOA
Submersible Rating: IPX8
Material: Aluminum
Dimensions: 1.6 x 1.1 x 0.9 inches
Weight: 1 oz

Special Features

  1. Enclosed Design: This Holosun enclosed sight is designed to offer additional protection to the optics.
  2. Multiple Reticle Options: The Holosun optics often feature multiple reticle options. Users can select which reticle to use for specific shooting scenarios.
  3. Shake Awake Technology: This feature activates the sight upon sensing motion and puts it to sleep when stationary, contributing to extended battery life.
  4. Durable Construction: The Holosun EPS Carry has a durable construction that can withstand harsh environmental conditions.
  5. Mounting Options: The Holosun EPS Carry offers various mounting options.

How Do Red Dot Sights Improve the Performance of Sig P322

Why trouble yourself using your P322’s iron sights? Use a red dot sight. Trust me, it would be the end of your shooting woes.

  1. Quick Target Acquisition: Red dot sights provide a clear aiming point, allowing for faster and more intuitive target acquisition. This is particularly beneficial in dynamic or self-defense situations where speed matters.
  2. Increased Accuracy: The precise aiming point of a red dot sight helps improve accuracy, especially in rapid-fire scenarios or when shooting at various distances.
  3. Improved Sight Picture: Red dot sights offer an unobstructed field of view, allowing users to maintain situational awareness while keeping their focus on the target. This can be advantageous in tactical and self-defense situations.
  4. Low Light Performance: Many red dot sights have adjustable brightness settings, making them effective in low-light conditions. This feature enhances visibility of the reticle, ensuring a clear sight picture even in challenging lighting environments.
  5. Reduced Parallax: Red dot sights are designed to be parallax-free, meaning the point of impact remains consistent regardless of the shooter’s eye position. This reduces the likelihood of aiming errors.
  6. Versatility in Shooting Positions: Red dot sights are effective in various shooting positions, including unconventional ones. This flexibility can be crucial in defensive or competitive shooting scenarios.
  7. User-Friendly for Beginners: Red dot sights can be easier for beginners to use compared to traditional iron sights. The simple reticle design aids in faster learning and improved shooting performance.
  8. Rapid Follow-Up Shots: With a red dot sight, shooters can quickly track and engage multiple targets, allowing for faster and more accurate follow-up shots.

Considerations When Choosing a Red Dot Sight for the Sig P322 Pistol

I don’t scrimp when it comes to competitive shooting. That includes choosing my optics. Here are some personal tips on how to choose the best red dot for your SIG SAUr P322.

  1. Compatibility: Make sure that the red dot sight you’re eyeing is designed to mount on the Sig P322. Check for compatibility with the mounting system or available adapter plates for the pistol.
  2. Mounting Options: Consider the mounting options available for the red dot sight. Some sights may require specific mounting plates or adapters to fit the Sig P322. 
  3. Size and Weight: The Sig P322 is a compact pistol. A compact and lightweight sight can maintain the overall balance and maneuverability of the pistol.
  4. Reticle Type and Size: Common reticles include dot and circle-dot. I would advise you to get a red dot that offers a number of reticle shapes rather than just the dot. Multiple reticules allow you to adjust your aim depending on the situation.
  5. Adjustable Brightness: Having adjustable brightness settings is crucial for adapting to different lighting conditions.
  6. Battery Life: Longer battery life or features like motion activation (turning on when the firearm is moved) and auto-shutoff can be beneficial for extending the overall lifespan of the battery. Most high-quality red dots have batteries that last for thousands of hours.
  7. Durability: Choose a red dot sight that has a strong or reinforced housing. Look for features such as shock resistance, waterproofing, and fog resistance.
  8. Ease of Use: A user-friendly design with accessible controls for brightness and windage/elevation adjustments can make your use of the red dot more effective and efficient. 
  9. Optics Quality: High-quality coatings on the lenses can improve light transmission and reduce glare.

How to Properly Maintain and Care for Red Dot Sights on the Sig P322 Pistol?

Your red dot’s performance is only as good as your level of care for it. To make sure its performance is top notch each time, check out these tips 

  1. Regular Cleaning: Keep the lens clean by using a lens brush or a microfiber cloth to remove dirt, dust, and smudges. 
  2. Protective Covers: When not in use, use protective covers or lens caps to shield the lenses from debris, moisture, and potential damage. 
  3. Water and Moisture: Red dot sights are often designed to be waterproof, but it’s still essential to wipe off any water or moisture after exposure to rain or wet conditions. 
  4. Battery Maintenance: Monitor the battery regularly and replace it according to the manufacturer’s recommendations or when the sight’s brightness appears diminished. 
  5. Storage: Store the pistol with the red dot sight in a dry and cool environment. Avoid storing firearms in areas with extreme temperatures or high humidity.
  6. Avoid Harsh Chemicals: Avoid using harsh cleaning chemicals on the lenses or the sight housing. These substances can damage lens coatings and the overall finish of the sight. 
  7. Check Mounting Screws: Regularly check the mounting screws to ensure they are secure and tighten if necessary. The recoil from firing the pistol can cause screws to loosen over time. 
  8. Function Checks: Conduct function checks regularly to ensure that the red dot sight is still properly zeroed. 
  9. Avoid Dropping or Impact: Handle the pistol with care to avoid dropping or subjecting the red dot sight to unnecessary impact. Sudden impacts can affect the zero and overall performance.
  10. Follow Manufacturer Guidelines: Adhere to the manufacturer’s guidelines and recommendations for maintenance and care. This may include specific instructions for cleaning, battery replacement, and other important aspects.


Hopefully, this review will help you find your preferred red dot sight for your Sig P322 pistol. I personally like the Holosun HS507K-X2 for its excellent overall general performance. The Swampfox Sentinel is also a winner if you prefer compact sights

Any of these sights will give you the opportunity to improve your shooting experience by improving accuracy and overall firearm performance.

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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