4 Best Red Dot for Sig P322

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Hey Shooters! Welcome to My Best Red Dot for Sig P322 Review.

I’m not just your average reviewer penning down thoughts from afar. I’ve tested these sights on my Sig P322 hands-on, bringing you a user-centric review. Amidst the extensive testing, 

HOLOSUN HS507K-X2 emerged as my top choice. This site transformed my experience, taking it from good to outstanding.

This article will take you through the top red dot sights for Sig P322, bringing you one step closer to finding your perfect accessory.

Top 4 Best Sig P322 Red Dots

1. HOLOSUN HS507K-X2 – Unparalleled Precision

HOLOSUN HS507K X2 Multi-Reticle Red 2 MOA Dot & 32 MOA Circle Open Reflex Pistol Sight - Durable Shake-Awake Parallax-Free Aluminum Sight for Subcompact Handguns
  • HOLOSUN RED DOT SIGHT - The HS507K X2 is an open reflex...
  • HIGH PERFORMANCE - This red dot sight features...
  • MULTI-RETICLE SYSTEM - This Holosun sight is equipped...
  • SHAKE AWAKE TECHNOLOGY - Extends battery life by...
  • SPECIFICATION - Reticle: Red 2 MOA Dot & 32 MOA Circle;...

The Holosun HS507K-X2 is an exceptionally versatile and high-performance micro red dot sight designed for precision and durability.

Reticle: The HS507K-X2 features a multiple reticle system with a 2 MOA dot, a 32 MOA circle, or a combination of both, offering a highly customizable shooting experience.

Battery Life: An outstanding battery life of up to 50,000 hours powered by a single CR2032 battery ensures long-lasting reliability.

Shake Awake Technology: The innovative Shake Awake technology activates the sight upon sensing motion, ensuring power saving and readiness in high-pressure situations.

Window Size: Despite its compact design, the HS507K-X2 provides a reasonably large window size of 0.58″ X 0.77″, facilitating swift target acquisition.

Construction: Constructed from high-grade 7075 aluminum, the sight’s robust housing is designed to handle significant physical impacts without compromising performance.

Why I love it: Its versatility, durable build, long battery life, and Shake Awake Technology make the Holosun HS507K-X2 a powerhouse in a small package.

Compatibility: The sight integrates seamlessly with the Sig P322, further enhancing its functionality and performance.

My Experience

As an expert, my experience with the Holosun 507K was nothing short of outstanding. From fast target acquisition to enduring hundreds of rounds, the sight performed brilliantly under various conditions.


  • Multiple reticle system for versatile shooting scenarios
  • Exceptional battery life
  • Rugged, durable construction
  • Seamless integration with Sig P322


  • The sight’s battery side tray screw is relatively small and may be tricky to handle
  • For some shooters, it may be challenging to shoot with both eyes open

2. SIG SAUER Romeo Zero Elite – Unmatched Clarity

SIG SAUER RomeoZero Elite 1x24mm 3 MOA Red Dot Shockproof Open Reflex Handgun Sight Compatible with Springfield Hellcat OSP, Glock G43X MOS & SIG Sauer P365 Optics-Ready Pistols
  • SIG SAUER PISTOL SIGHT - Scratch-resistant glass...
  • DURABLE - Carbon-infused polymer housing with...
  • VISIBLE - All rear surfaces of the housing have...
  • COMPATIBILITY - This SIG SAUER red dot sight is...
  • SPECIFICATION - Magnification: 1x; Objective Lens...

The RomeoZero Elite is a compact, feature-packed red dot sight from SIG Sauer, designed for easy everyday carry and superior versatility in various shooting situations.

Size and Construction: The sight’s compact dimensions make it perfect for micro-compact EDC pistols. Its robust construction, with carbon-mixed polymer housing, ensures durability and resilience.

Glass Lens: Unlike many red dots at this price point, the RomeoZero uses a coated glass lens which is more scratch-resistant and offers superior clarity and less distortion compared to plastic lenses.

Reticle Options: The RomeoZero Elite comes in two versions: one with a standard 3 MOA dot and another with a 2 MOA dot inside a 32 MOA circle. 

TAP System: The sight features SIG’s TAP (touch-activated programming) system, allowing you to easily adjust the reticle type and brightness using a small button.

MOTAC: The sight incorporates SIG’s MOTAC (motion-activated sensor) technology that powers the sight on when moved and powers it down when idle. This helps prolong battery life.

Why I love it: The ROMEOZero Elite’s combination of compact size, excellent reticle options, durability, and intuitive features like TAP and MOTAC make it a standout choice in the realm of micro red dot sights. The versatility it offers, especially with its reticle choices, truly enhances my shooting experience.

Compatibility: The sight fits perfectly on the Sig P322, enhancing its capabilities without adding significant bulk or weight. 

My Experience

I’ve used the ROMEOZero Elite on several pistols and under various conditions, from rain to freezing temperatures, and it’s proven to be consistently reliable and effective. It’s particularly impressive on the P322, which offers great aiming versatility without sacrificing compactness and ease of carry.


  • Compact and lightweight
  • Robust construction with carbon-mixed polymer
  • Glass lens provides superior clarity
  • TAP system for easy reticle and brightness adjustments


  • Slight blue tinge on the lens
  • The brightness and reticle selection buttons can be small and tricky to operate for some users

3. Swampfox Sentinel – Highly Durable

Swampfox Sentinel Micro Reflex, Auto Brightness, Red Dot
  • IN THE BOX: Optix w/sheath, screwdriver, lens cloth,...
  • AUTO BRIGHTNESS MODEL: A photosensitive sensor on the...
  • COMPACT UNOBSTROCTIVE FIT: Shoehorned into this tiny...
  • DUTY GRADE: Made from 7075 aluminum that is hard coat...
  • DOUBLE THE LIFE: The CR2032 battery effectively doubles...

The Swampfox Sentinel is a compact, rugged, and efficient red dot sight, perfect for Sig P322.

Durable Body: Built from 7075 T6 aluminum, the Swampfox Sentinel boasts a slim, durable body similar to the 507K X2, providing reliable performance for duty carries.

Lens Protection: The Ironsides Shield offers additional protection to the lens hood, shielding against barricade racking, drops, and other physical impacts to protect the internals.

Low-Profile Lens Hood: The Sentinel’s low-profile lens hood facilitates aiming with both eyes open without the lens frame obstructing the view.

Brightness Modes: Available in both Manual and Auto models, Sentinel-M resumes its previous brightness level, ideal for indoor low-light use, while the Auto mode adjusts the dot brightness according to ambient lighting conditions.

Brighter Dot and Longer Battery Life: The Swampfox Sentinel ensures an illuminated reticle with a 3 MOA red or green dot and boasts a long battery life, running continuously for nearly two years.

Why I love it: I appreciate its compact size, robust build, and exceptional performance. The sight holds zero impeccably, and the shake-awake feature is a valuable addition, helping to conserve battery life.

Compatibility: With its RMSc footprint, the Swampfox Sentinel mounts directly to the Sig P322 slide, requiring no modification. It pairs perfectly with the firearm and enhances its shooting accuracy.

My Experience

Having tested the Swampfox Sentinel on the Sig P322, I found it to be a highly effective and user-friendly sight. Its brightness settings are superb, it held zero throughout testing, and it proved to be robust and durable under rigorous conditions.


  • The high-quality, bright dot
  • Durable and rugged design
  • Long battery life
  • Fits directly to Sig P322 without any modification
  • Budget-friendly price point


  • The battery replacement process can be a bit inconvenient
  • Lacks a rear sight cut

See Detailed Comparison of Swampfox Sentinel & Holosun 507k.

4. Holosun EPS Carry – Enclosed Emitter

HOLOSUN EPS Carry Red MRS 2 MOA Dot & 32 MOA Circle Reflex Pistol Sight - Waterproof Shake-Awake Solar Failsafe Enclosed Sight for Subcompact Handgun s- RMSc-to-K Footprint Adapter Plate Included
  • HOLOSUN REFLEX SIGHT - The EPS Carry-RD-MRS is an...
  • HIGH PERFORMANCE - The EPS Carry-RD-MRS handgun sight...
  • MULTI-RETICLE SYSTEM - This Holosun sight is equipped...
  • SOLAR FAILSAFE - If your battery fails, this red dot...
  • SPECIFICATION - Reticle: Red 2MOA Dot & 32MOA Circle;...

The Holosun Carry Enclosed is a compact, reliable, and weather-resistant red dot sight with a closed emitter, making it a top choice for rugged environments and concealed carry.

Enclosed Emitter: The Holosun Carry Enclosed features a closed emitter design, meaning the light source and the glass are contained within a sealed housing. This design ensures fewer issues with dust and rain, providing a crisp and clear sight picture even in challenging conditions.

Long Battery Life: With a battery life of around 5,000 hours, this red dot ensures reliability and longevity. The easy-to-access battery door allows for quick and hassle-free battery changes without needing to remove the optic from your firearm.

Brightness Adjustment: The sight includes eight brightness settings and four-night vision settings, making it adaptable to a wide range of lighting conditions. The adjustment buttons are easy to reach, giving you the ability to adapt on the fly.

Reticle Options: The Holosun Carry Enclosed offers multiple reticle options, including 2 MOA, 6 MOA, and a 2 MOA dot with a 32 MOA ring. Both red and green reticles are available, catering to individual preferences and specific shooting scenarios.

Durability: This red dot sight is constructed to handle rugged conditions. It held its zero and functioned perfectly during multiple reliability tests, including impacts and drops, proving its toughness.

Why I love it: I appreciate the Holosun Carry Enclosed for its solid performance and durability. The closed emitter design is especially appealing, providing a clear dot even in challenging weather conditions. Additionally, the long battery life and ease of adjusting brightness make it a user-friendly option.

Compatibility: The Holosun Carry Enclosed utilizes the RMSc footprint, making it compatible with the Sig P322. It also comes with various screw lengths for mounting, further ensuring a secure fit.

My Experience

The Holosun Carry Enclosed performed admirably during my time with it. From the moment I mounted it onto the Sig P322, the optic felt robust and reliable. Its closed emitter design proved valuable in different weather conditions, and the dot remained clear and crisp throughout my testing. Changing brightness levels was effortless, and the dot’s clarity remained consistent across all settings.


  • Closed emitter design for better performance in adverse conditions
  • Long battery life with easy-access door
  • Multiple reticle options
  • Robust and durable construction
  • Easy-to-use brightness adjustment


  • Slight blue hue on the glass
  • Possible brightness adjustment button issues for left-handed shooters.

Final Verdict

As a shooter who’s rigorously tested these red dot sights on my Sig P322, my experiences have given me a clear view of the best sight on the market. Taking into account key elements like reliability, durability, compatibility, and ease of use, I’m drawn to one sight in particular that significantly enhances my shooting experience – the HOLOSUN HS507K-X2. 

While the other sights I’ve tested also have their own unique strengths, none come close to matching the overall performance and adaptability of the HOLOSUN HS507K-X2.

That said, the ideal sight varies from shooter to shooter, and what works best for me might not be the perfect fit for everyone. Hence, I recommend shooters identify their specific needs and preferences to select the sight that’s the perfect fit for them.


What red dot fits P322?

The HOLOSUN HS507K-X2, SIG SAUER Romeo Zero Elite, Swampfox Sentinel, and Holosun Carry Enclosed red dot sights fit the Sig P322.

Will the Holosun red dot fit the SIG P322?

Yes, both the HOLOSUN HS507K-X2 and the Holosun Carry Enclosed fit the SIG P322.

Will Romeo Zero Pro fit P322?

Yes, the Romeo Zero Pro fits the P322.

What size red dot is best for self-defense?

A red dot size of 6 MOA is typically recommended for self-defense purposes as it provides a good balance between accuracy and speed of target acquisition.

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I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.

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