The best red dot for SIG P322 can significantly improve accuracy, target acquisition speed, and overall shooting performance on this compact pistol. I have spent time reviewing a wide range of optics designed for subcompact handguns, and these sights stand out for their clear sight pictures, durable construction, and intuitive operation.
In this guide, I will cover the key features of these red dots, highlight the top picks, provide a helpful buying guide, and answer common questions that arise when choosing an optic for the SIG P322.
Whether you are carrying, training, or just enhancing your pistol setup, these red dots are designed to make shooting faster, easier, and more precise.
About The SIG P322
The SIG P322 is a subcompact, striker-fired pistol that offers a balance of concealability and performance.
Designed with ergonomics and reliability in mind, it features a polymer frame for reduced weight, a smooth trigger system, and a slide profile optimized for compact carry.
Its design allows for easy handling and accurate shooting in close to medium ranges, making it a popular choice for everyday carry and personal defense.
The P322’s optics-ready models make it compatible with a variety of micro red dot sights, giving shooters the option to enhance speed and precision without compromising concealability.
See summary of the best red dots for SIG P322:
- HOLOSUN HE507K-GR X2 / HS507K X2: Best overall
- Aimpoint ACRO P-2 Red Dot Sight: Best premium option
- HOLOSUN EPS Carry: Best compact option
- HOLOSUN HS407K X2: Best battery life
- Trijicon RMRcc: Best reliability and durability
- Shield RMSsc – Reflex Mini Sight: Best for concealed carry
- OSIGHT SE Enclosed Micro Red Dot Sight: Best value
7 Best Red Dots For SIG P322
1) HOLOSUN HE507K-GR X2 / HS507K X2
Check Price in Amazon
The HOLOSUN HE507K-GR X2, also known as the HS507K X2, is a high-performance red dot sight that pairs seamlessly with the SIG P322, offering shooters precision and reliability in a compact package. Designed with both versatility and durability in mind, this optic combines a clear sight picture with advanced features that make it ideal for a range of shooting applications. Its compact dimensions and lightweight design ensure minimal impact on handling and balance, making it a natural fit for the P322.
The optics system utilizes aspherical multi-coated lenses, which enhance light transmittance for a brighter, clearer sight picture. The 0.58 x 0.77 inch window provides a wide field of view, helping users quickly acquire targets with minimal distraction. The sight is fully parallax free and the optic window is waterproof, reducing the chance of water accumulation that could obscure the view.
This red dot employs Holosun’s K Footprint, ensuring compatibility with a variety of mounts while adding strength to the design. Built with a 7075 T6 aluminum housing and rated for IP67 waterproofing, the sight can withstand heavy use and harsh environmental conditions. The optic is also rated to handle 5000G of shock, making it durable enough for regular range sessions or field use.
The Multi-Reticle System (MRS) gives users flexibility in aiming options. Shooters can select between a 2 MOA dot, a 32 MOA circle, or a combination of both. Twelve brightness levels make it adaptable for different lighting conditions, ensuring that the reticle remains visible without overwhelming the target area. The motion activation feature helps conserve battery life by automatically entering sleep mode after periods of inactivity, while waking instantly when movement is detected. Users can also choose to disable motion detection and control power manually.
Battery management is simple thanks to the side-load compartment, which allows replacement without removing the sight from the firearm. A memory function restores the previous brightness setting when the optic is turned back on, providing convenience and consistency for repeated use.
Pros
- Lightweight and compact, ideal for SIG P322
- Clear and bright aspherical multi-coated lenses
- Waterproof and shockproof construction
- Multi-Reticle System with three reticle options
- Twelve brightness levels for various lighting conditions
- Motion-activated sleep mode with instant wake
- Side-load battery compartment for easy replacement
- Memory function restores previous brightness setting
Cons
-
Plastic body may feel less premium than full-metal optics
2) Aimpoint ACRO P-2 Red Dot Sight
Check Price in Amazon
The Aimpoint ACRO P‑2 is a compact, rugged red dot sight designed to enhance the performance of the SIG P322. Its small size and lightweight design make it easy to mount without affecting handling or balance, while the enclosed emitter design protects the optic from recoil, debris, and harsh use. This makes the ACRO P‑2 a reliable option for everyday shooting, training, and tactical applications.
The sight features a crisp 3.5 MOA red dot that provides a clear aiming point without covering the target. Ten brightness settings allow for easy adaptation to different lighting conditions, including daylight and low-light scenarios, and the optic also has night vision compatible settings. The dot remains precise and consistent across multiple shots, helping shooters quickly acquire targets and maintain follow-up accuracy.
Durability is a key strength of the ACRO P‑2. The aluminum housing is hard anodized, fully sealed, and both waterproof and shock resistant. This ensures the optic maintains zero even under heavy recoil or rough handling. The enclosed emitter design also reduces glare and reflections, giving shooters an unobstructed sight picture at all times.
Battery life is excellent, offering thousands of hours of continuous operation on a single battery. Adjustments for windage and elevation are simple with capped adjustment windows, ensuring users can fine-tune the optic to their preference. Installation is straightforward when the SIG P322 is equipped with the proper footprint or adapter plate, and once mounted, the optic maintains its zero reliably.
Pros
- Clear and consistent 3.5 MOA red dot
- Ten brightness settings, including night vision compatible levels
- Compact and lightweight design preserves pistol balance
- Waterproof and shock resistant aluminum housing
- Enclosed emitter reduces glare and protects internal components
- Long battery life for extended use
Cons
-
3.5 MOA dot may feel large for extremely precise shots
3) HOLOSUN EPS Carry
Check Price in Amazon
The HOLOSUN EPS Carry is a compact enclosed red dot that works exceptionally well on the SIG P322, especially for shooters who want a protected optic with modern features in a small footprint. Designed for slim and subcompact handguns, this sight keeps the profile low while still delivering a clear and reliable aiming solution. Its enclosed design helps keep dust, moisture, and debris away from the emitter, which is a major advantage for consistent performance during range sessions or training.
The sight uses an aspheric lens that provides a sharp and distortion free sight picture. With a window size of 0.58 x 0.77 inches, it offers a balanced view that is easy to track without feeling bulky on the pistol. The ultra low dot height allows co witness compatibility with most factory iron sights, and the built in rear notch sight adds an extra layer of usability if the optic is ever unavailable. The housing is made from 7075 T6 aluminum with an anodized finish, giving the EPS Carry a solid and durable feel.
Holosun’s Multi Reticle System gives shooters multiple aiming options. You can choose a precise 2 MOA dot, a 32 MOA circle for faster target acquisition, or a combination of both. The large circle helps guide the eye to the center dot and can also be used as a reference for hold over at closer distances. Brightness is adjustable with ten daylight settings and two night vision compatible levels, making the optic adaptable to different lighting conditions.
Power management is another strong point. The EPS Carry uses a CR1620 battery that delivers up to 50,000 hours of runtime. It also includes Solar Failsafe technology, which provides backup power when sufficient natural or artificial light is available. In Auto Mode, the reticle intensity adjusts automatically based on ambient light, ensuring visibility without constant manual adjustments.
Installation is flexible thanks to the included RMSc to K footprint adapter plate, which increases compatibility with different slide cuts. Once mounted on the SIG P322, the optic holds zero well and provides consistent performance. With parallax free operation, unlimited eye relief, and precise 1.5 MOA adjustment clicks, the EPS Carry delivers both accuracy and convenience in a compact package.
Pros
- Enclosed emitter design protects against debris and moisture
- Clear aspheric lens with a clean sight picture
- Multi Reticle System with dot and circle options
- Solar Failsafe provides backup power in bright conditions
- Long battery life up to 50,000 hours
- Low profile design allows iron sight co witness
- Durable 7075 T6 aluminum housing
Cons
-
Smaller window may feel tight for some shooters
4) HOLOSUN HS407K X2
Check Price in Amazon
The HOLOSUN HS407K X2 is a lightweight, open reflex sight designed specifically for subcompact pistols like the SIG P322. Its small footprint and minimal weight make it an excellent choice for shooters seeking a low-profile optic that does not interfere with handling. The HS407K X2 is built to fit directly on P365X/XL models, while slides with a four-boss interface require an adapter plate for proper mounting.
This red dot sight features a crisp 6 MOA dot with 12 intensity settings, including ten daylight levels and two night vision compatible options. The optical system uses multilayer reflective glass, which maximizes light transmission, reduces glare, and improves clarity while minimizing power consumption. The sight is parallax free and offers unlimited eye relief, ensuring fast target acquisition and consistent accuracy.
Durability is a strong aspect of the HS407K X2. The housing is made of 7075 T6 aluminum with an anodized finish, providing a solid, long-lasting structure capable of withstanding heavy use. Holosun’s K footprint adds compatibility with a variety of mounts, while the side-mounted CR1620 battery tray allows for quick and easy battery replacement. The battery can last up to 50,000 hours, making this optic reliable for extended shooting sessions without frequent maintenance.
The HS407K X2 incorporates Shake Awake technology to extend battery life. This feature deactivates the LED after a period of inactivity, which can be set from 10 minutes to 12 hours or disabled entirely. A simple touch or movement instantly reactivates the sight, ensuring the optic is ready when needed. Lock Mode prevents accidental changes to brightness or reticle settings, adding an extra layer of control for the user.
Pros
- Lightweight and compact for subcompact pistols
- Crisp 6 MOA red dot with 12 brightness settings
- Multilayer reflective glass improves clarity and reduces glare
- Side-mounted battery tray allows easy replacement
- Shake Awake technology extends battery life
- Durable 7075 T6 aluminum housing
- Lock Mode prevents accidental setting changes
Cons
- Open reflex design leaves lens more exposed to scratches
5) Trijicon RMRcc
Check Price in Amazon
The Trijicon RMRcc is a high-quality red dot sight designed for compact pistols, making it a strong choice for the SIG P322. Its compact, low-profile design ensures that it does not interfere with handling or concealment while providing a reliable aiming solution. The sight is made from durable aluminum, giving it a solid feel and long-lasting performance for daily shooting or training.
This red dot sight features a crisp 6.5 MOA aiming point, which provides a clear and precise reference without obscuring the target. It offers eight brightness settings, including six visible and two night vision compatible, allowing adaptation to a wide range of lighting conditions. The automatic brightness adjustment also helps maintain a consistent dot visibility in changing light environments.
Battery life is impressive, with up to four years of continuous use at moderate temperature and brightness levels. This long runtime reduces the need for frequent battery changes, making the RMRcc extremely convenient for shooters who want reliable performance over time. The sight has a generous adjustment range, offering 150 MOA total travel for windage and elevation, which ensures precise zeroing on the SIG P322.
Installation is straightforward on pistols that have the appropriate footprint, and once mounted, the RMRcc holds zero consistently even after repeated shooting sessions. The optic provides unlimited eye relief and parallax-free operation, allowing fast target acquisition from multiple shooting angles. Its lightweight and compact footprint also make it an excellent option for concealed carry or subcompact handgun use.
Pros
- Crisp 6.5 MOA red dot for precise aiming
- Eight brightness settings, including night vision compatible options
- Automatic brightness adjustment for changing light conditions
- Durable aluminum construction
- Long battery life up to four years of continuous use
- Generous 150 MOA total adjustment range for precise zero
- Compact, low-profile design for subcompact pistols
Cons
-
Higher price point compared to some micro red dot options
6) Shield RMSsc – Reflex Mini Sight
Check Price in Amazon
The Shield RMSsc is a micro-compact red dot sight designed specifically for concealed carry and small-form-factor pistols, making it an ideal match for the SIG P322. Its compact size and lightweight profile ensure comfort and ease of use without compromising performance. The sight maintains a low profile, which allows for co-witnessing with standard height iron sights when installed on a direct slide mount or with the low-profile mounting kit.
This reflex sight is designed for streamlined operation. It is always on and ready, with no need to activate the optic using a button or motion sensor. This ensures that as soon as the pistol is drawn, the red dot is visible and ready for immediate target acquisition. The RMSsc features automatic brightness adjustment with a rapid response light sensor, which samples ambient light thousands of times per second. This provides optimal reticle visibility in both bright and low-light conditions, improving situational awareness and response times.
The RMSsc is built from aerospace grade anodized T6 6082 aluminum, offering excellent corrosion resistance and a durable structure capable of withstanding daily carry and use. The crystal clear lens has no magnification or colored coatings, maximizing clarity and reducing glare. The sight comes in 4 or 8 MOA red dot options, with a CR1632 battery providing approximately 1.5 years of average use. It is night vision compatible and carries an IP67 rating for dust and water resistance.
Installation is simple for pistols with a compatible RMSc footprint, and the sight retains all the core features expected from Shield optics. Its micro-compact body, combined with eye-safe red LED illumination, automatic brightness adjustment, and low bore axis height, ensures the shooter has a reliable, efficient aiming solution in a small and concealable package.
Pros
- Micro-compact size for concealed carry and small pistols
- Always-on operation requires no activation
- Automatic brightness adjustment for changing light conditions
- Low height allows co-witnessing with standard iron sights
- Durable aerospace grade anodized aluminum housing
- Clear lens with no magnification or colored coatings
- Night vision compatible and IP67 rated
Cons
-
Limited battery life compared to some other red dot sights
7) OSIGHT SE Enclosed Micro Red Dot Sight
Check Price in Amazon
The OSIGHT SE Enclosed Micro Red Dot Sight is a compact, high-performance optic designed for subcompact pistols like the SIG P322. Its fully enclosed emitter design protects the sight from dust, debris, and environmental exposure, ensuring consistent performance in a variety of conditions. The lightweight aluminum housing adds durability without adding unnecessary bulk, making it a practical choice for everyday carry and range use.
The sight features an aspherical lens that provides a parallax-free, distortion-free view for fast and precise target acquisition. The large optic window offers a clear sight picture, allowing the shooter to maintain situational awareness while keeping the red dot in view. The optic includes a side-load battery compartment, making it easy to replace the battery without removing the sight or disturbing zero, while still providing reliable, consistent performance.
The OSIGHT SE uses an RMSc/K footprint, making it compatible with most optics-ready slides. This allows for straightforward installation and integration on a variety of subcompact pistol builds. The sight incorporates a 2 MOA dot and a 32 MOA circle, with the option to use dot-only, circle-only, or both. This Multi-Reticle System provides flexibility for fast target acquisition or precision shooting in different operational conditions.
With its combination of durable housing, clear optics, flexible reticle options, and convenient side-load battery, the OSIGHT SE offers a well-rounded red dot experience for SIG P322 owners. Its compact design ensures minimal interference with handling and allows for easy concealment while retaining all the benefits of a micro red dot sight.
Pros
- Fully enclosed emitter protects against dust and debris
- Parallax-free aspherical lens with a clear large window
- Side-load battery allows easy replacement without removing the optic
- RMSc/K footprint ensures broad compatibility with optics-ready slides
- Multi-Reticle System with 2 MOA dot and 32 MOA circle options
- Lightweight aluminum housing adds durability without bulk
Cons
-
Not night vision compatible
Factors to Consider When Choosing The Best Red Dots For SIG P322
Durability and Build Quality
A reliable red dot should be built to withstand regular use and the recoil of a pistol. High-quality materials such as anodized aluminum or reinforced alloys help protect the optic from impacts, moisture, and dust. Durable construction ensures that the sight maintains zero and continues performing accurately over time, even in challenging conditions.
Optic Window and Lens Quality
The clarity and size of the optic window directly affect target acquisition and sight picture. Lenses with multi-coated or aspherical designs improve light transmission, reduce glare, and provide a sharp, distortion-free view. A larger window allows shooters to quickly acquire targets without losing situational awareness, while high-quality coatings help maintain consistent clarity in bright or low-light environments.
Reticle Options
Different reticle configurations, such as dot-only, circle-only, or combined dot and circle, offer flexibility for various shooting scenarios. Choosing an optic with multiple reticle options allows the shooter to adjust for fast target acquisition at close range or more precise aiming at longer distances. This adaptability improves overall shooting efficiency.
Brightness and Light Adaptation
Adjustable brightness is essential for maintaining visibility in different lighting conditions. Optics with multiple daylight settings and night vision compatibility allow for consistent reticle visibility whether shooting in bright sunlight, indoor ranges, or low-light situations. Automatic brightness adjustments can further enhance performance by responding to ambient light changes.
Battery Life and Power Management
Long battery life is important for minimizing interruptions during use. Some optics feature extended runtime, motion-activated sleep modes, or solar backup to preserve battery life. Easy battery replacement, such as side-load compartments, ensures that the optic can remain operational without requiring complex disassembly or re-zeroing.
Size and Weight
A compact and lightweight optic maintains the balance and handling of the pistol. Bulky or heavy optics can interfere with grip, carry comfort, and concealment, especially on subcompact models. The ideal red dot should provide a clear sight picture without compromising the natural handling of the firearm.
Mounting Compatibility
Ensuring that the red dot matches the slide footprint of the pistol is crucial for secure installation. Some optics require adapter plates or specific cut patterns to fit correctly. Proper mounting ensures that the sight maintains zero, aligns accurately with the iron sights, and offers reliable performance during repeated use.
Ease of Use and Operational Features
Intuitive operation simplifies aiming and reduces distractions in critical situations. Features such as always-on optics, motion activation, or simple control buttons allow shooters to focus on their target. Easy-to-adjust windage and elevation controls also contribute to a smooth setup and consistent accuracy.
Best Red Dots For SIG P322 FAQs
How do I know if a red dot will fit my pistol?
Compatibility depends on the slide footprint and mounting design. Checking the optic’s mounting specifications and whether adapter plates are included can ensure a secure fit and reliable zero retention.
What is the ideal dot size for a subcompact pistol?
Smaller dots, like 2 to 6 MOA, provide precise aiming without covering too much of the target. Choosing a dot size depends on shooting distance and personal preference, balancing speed of acquisition and precision.
How long do red dot batteries typically last?
Battery life varies depending on the optic’s design and usage. Some models offer tens of thousands of hours of runtime or feature power-saving modes and backup systems to extend battery life.
Are these optics suitable for low-light conditions?
Yes, optics with adjustable brightness settings and night vision compatibility allow for effective use in both low-light and bright-light environments. Automatic brightness adjustment can further improve visibility in changing lighting conditions.
Conclusion
Red dot sights for the SIG P322 offer shooters a combination of speed, precision, and reliability in a compact package. These optics provide clear sight pictures, flexible reticle options, and durable construction, making them suitable for everyday carry, training, and tactical scenarios.
Their lightweight design and intuitive operation enhance handling while maintaining accuracy, making them a valuable upgrade for any pistol owner seeking improved target acquisition and overall shooting performance.
See Also: