When choosing the best red dots for SIG P320 DH3, there are several critical factors to consider, including durability, ease of use, reticle size, and battery life.
These red dot sights enhance accuracy, speed, and versatility. A high-quality red dot sight can help you stay on target quickly, whether you’re in a fast-paced tactical scenario or engaging in target shooting.
About the SIG P320 DH3
Specifications
- Caliber: 9mm Luger
- Pistol Size: Full-Size
- RX footprint: PRO
- Trigger Action: Striker
- Accessory Rail: M1913
- Length: 8.5 in
- Width: 1.6 in
The SIG P320-XFIVE DH3 is a high-performance handgun designed for versatility, blending competition and tactical features. Developed by SIG Custom Works in collaboration with Team SIG’s Daniel Horner, it inherits the robust foundation of the P320-XFIVE LEGION while offering enhanced attributes.
The standout features include an optic-ready slide equipped with suppressor-height X-RAY3 day/night sights, a 5-inch match-grade bull barrel, and a Cerakote Coyote TXG grip module treated with silicon carbide for superior grip in all conditions.
This tungsten-infused heavy grip module adds stability and control, complementing a customizable shooting experience via 12lb and 14lb 1911-style recoil springs. The DH3 includes three 21-round steel magazines, ensuring ample capacity for any scenario. Whether for competitive shooting or tactical applications, the P320-XFIVE DH3 excels in speed, precision, and capacity.
Best Red Dots for SIG P320 DH3
1) SIG SAUER Romeo 1 Pro 1x30mm Reflex Red Dot Sight
The SIG SAUER Romeo1Pro 1x30mm Reflex Red Dot Sight is one of the best red dots for SIG P320 DH3, it features a 3 MOA red dot, unlimited eye relief, long battery life, motion-activated Illumination, TruHold Lockless Zeroing System and a waterproof and fogproof performance.
The red dot sight is designed for rapid target acquisition and precision making it ideal for competitive shooters and tactical users. Its 3 MOA red dot offers clarity and consistency, ensuring pinpoint accuracy under various lighting conditions.
Enhanced by the TruHold Lockless Zeroing System, it maintains zero even after repeated handgun recoil, making it a reliable companion in high-stakes environments.
Constructed with an aircraft-grade CNC aluminum housing, the Romeo1Pro delivers exceptional durability. It is IPX-7 rated for water immersion up to 1 meter and features fog-proof performance, ensuring reliability in adverse weather.
Additionally, the molded glass aspheric lens with high-performance coatings minimizes distortion while maximizing light transmission. The inclusion of a ruggedized steel protective shroud further boosts its resilience, safeguarding the sight against potential impacts.
With 12 brightness settings (10 daytime and 2 night vision), this red dot adapts seamlessly to different environments. The new point-source emitter delivers over 20,000 hours of runtime, complemented by the Motion Activated Illumination System (MOTAC) for automatic power management. These features make it both efficient and ready for extended use.
Key Features
- Superior Optics: Molded glass aspheric lens ensures excellent clarity with minimal distortion.
- Robust Build: CNC aluminum housing and steel protective shroud provide unmatched durability.
- Enhanced Usability: TruHold Zeroing System and MOTAC enhance accuracy and battery efficiency.
- Brightness Control: Twelve settings adapt to any lighting condition, including night vision compatibility.
Pros
- Exceptional clarity and distortion-free optics.
- Durable, water-resistant, and fog-proof construction.
- The motion-activated power-saving feature extends battery life.
- Compatible with a wide range of lighting scenarios.
- Includes a protective shroud for added durability.
Cons
- Slightly higher price point compared to some competitors.
2) HOLOSUN HS407K X2 Reflex Red Dot Sight
The Holosun HS407K X2 Reflex Red Dot Sight is an excellent choice for the SIG P320 DH3. This sight combines robust performance, advanced technology, and user-friendly features. Its crisp 6 MOA dot ensures rapid target acquisition, ideal for both defensive and competition shooting. The dot’s brightness is adjustable through 12 intensity settings, including 10 daylight and 2 night-vision compatible levels, ensuring usability across various lighting conditions.
Engineered for longevity, the HS407K X2 features a durable 7075 T6 aluminum housing with a corrosion-resistant anodized finish. The Shake Awake Technology automatically powers down the sight when inactive and instantly reactivates with the slightest motion, significantly extending its 50,000-hour battery life.
The side-mounted CR1620 battery tray allows easy replacements without removing the sight, preserving zero and simplifying maintenance.
The multilayer reflective glass enhances light transmission and reduces glare, delivering a clear and bright reticle with reduced power consumption. The addition of Lock Mode prevents accidental adjustments to the settings, ensuring consistent performance in critical moments.
While this sight is directly compatible with certain handgun models, such as the SIG P365X/XL, it requires an adapter plate for four-boss interface slides, allowing versatility across different firearms.
Key Features
- Exceptional Optics: 6 MOA red dot and multilayer reflective glass provide clarity and reduced glare.
- Durable Construction: 7075 T6 aluminum housing ensures ruggedness in harsh conditions.
- Battery Efficiency: Shake Awake Technology and 50,000-hour battery life support extended use.
- User-Friendly Design: Side-mounted battery tray and Lock Mode enhance usability and reliability.
Pros
- Long battery life and energy-saving features.
- A compact and lightweight design ideal for subcompact pistols.
- Easy brightness adjustments with 12 reticle intensity settings.
- Side-mounted battery access simplifies maintenance.
- Durable housing for reliable performance in tough environments.
Cons
- Requires an adapter plate for slides with a four-boss interface.
3) Burris FastFire III Reflex Red Dot Sight
The Burris FastFire III Reflex Red Dot Sight is one of the best red dots for SIG P320 DH3, it is available in two dot sizes, 3 MOA for precision shooting and 8 MOA for rapid target acquisition in close-range scenarios. This adaptability ensures the sight meets different shooting needs, from tactical applications to competition. Its lightweight and compact design integrates seamlessly with the P320 DH3, maintaining firearm balance and enhancing handling.
Equipped with an automatic brightness sensor, the FastFire III adjusts the reticle’s brightness to match ambient lighting, ensuring optimal visibility. For shooters who prefer manual control, three brightness levels are also available. The red dot is crisp and parallax-free, enabling both-eyes-open shooting for improved situational awareness and faster target acquisition.
Built with high-grade optical glass and Hi-Lume multicoating, the sight delivers excellent clarity and light transmission, even in low-light conditions.
Durability is a hallmark of the FastFire III. Its shockproof and waterproof construction ensures consistent performance under recoil and in challenging environments.
The top-mounted battery compartment allows for quick and hassle-free battery replacements without the need to remove the sight, preserving zero. With an automatic shutoff feature and a long-lasting CR1632 battery, the FastFire III offers up to five years of use, ensuring reliability when you need it most.
Key Features
- Versatile Dot Sizes: Available in 3 MOA or 8 MOA for precision or rapid shooting.
- Automatic Brightness Adjustment: Ensures the dot remains visible in changing light conditions.
- Robust Construction: Shockproof and waterproof for durability in tough environments.
- Easy Battery Access: Top-mounted battery compartment simplifies replacements.
- High-Quality Optics: Hi-Lume multicoating enhances clarity and reduces glare.
Pros
- The lightweight and compact design maintains firearm balance.
- Long battery life with automatic shutoff for efficiency.
- Parallax-free optics for improved accuracy.
- Toolless windage and elevation adjustments.
- Backed by the Burris Forever Warranty.
Cons
- Smaller viewing window compared to larger reflex sights
4) Vortex Viper 1x24mm Reflex Red Dot Sight
The Vortex Viper 1x24mm Reflex Red Dot Sight is an outstanding choice for the SIG P320 DH3, particularly for those seeking a sleek, reliable optic tailored to competitive and tactical shooting scenarios.
Its low-profile design is ideal for use with cut-out slides, allowing it to co-witness seamlessly with iron sights. Featuring a crisp 6 MOA red dot, the Viper ensures rapid target acquisition, making it a great option for both close-range precision and quick engagements.
This red dot sight boasts a fully multi-coated lens that delivers a crystal-clear and wide field of view, ensuring you maintain full situational awareness.
The ultra-clear optics are further protected by Vortex’s proprietary Armortek coating, safeguarding against oil, dirt, and scratches. Built with a single-piece aluminum chassis, the Viper is both waterproof and shockproof, designed to endure demanding conditions without compromising performance.
Adjustments are intuitive, with 1 MOA windage and elevation clicks that allow for precise tuning. The 10 brightness settings, powered by a long-lasting CR2032 battery, provide optimal visibility in various lighting conditions, from low-light environments to bright outdoor settings. Additionally, the Viper’s parallax-free design ensures accuracy by eliminating aiming discrepancies caused by parallax.
Key Features
- Low Profile: Compatible with cut-out slides, allowing co-witnessing with iron sights.
- 6 MOA Dot: Bright and clear reticle for rapid target acquisition.
- Durable Construction: Waterproof, shockproof, and protected by Armortek coatings.
- Easy Adjustments: 1 MOA clicks for windage and elevation, plus 10 brightness settings.
- Long Battery Life: Offers 150 to 30,000 hours of use depending on brightness levels.
- VIP Warranty: Unconditional lifetime warranty from Vortex for peace of mind.
Pros
- Compact and low-profile design enhances firearm handling.
- Clear and wide field of view for improved situational awareness.
- Rugged build ensures reliability in harsh conditions.
- Straightforward controls for adjustments and illumination.
- Backed by an industry-leading lifetime warranty.
Cons
- Limited to a 6 MOA dot; smaller dot sizes are not available
5) Leupold DeltaPoint Pro Reflex Sight
The Leupold DeltaPoint Pro Reflex Sight is one of the best red dots for SIG P320 DH3, blending exceptional performance with unmatched durability. Featuring Leupold’s Professional-Grade Red Dot Optical System, this sight is designed for shooters who demand superior clarity and precision.
The system provides industry-leading light transmission, delivering excellent performance in low-light and bright conditions alike. Its glare reduction ensures a clear sight picture, even in direct sunlight, while the 2.5 MOA red dot reticle facilitates fast, accurate target acquisition.
Durability is a cornerstone of the DeltaPoint Pro’s design. Constructed with lightweight yet rugged aluminum housing and reinforced by a spring steel sheath, this optic is built to withstand the harshest environments.
It is waterproof, fogproof, and shockproof, ensuring reliable performance in all weather conditions. The tool-less battery compartment on top makes battery changes quick and hassle-free, while the Motion Sensor Technology (MST) prolongs battery life by automatically deactivating the reticle after five minutes of inactivity, reactivating instantly upon movement.
Ease of use is another highlight of the DeltaPoint Pro. It features 1 MOA click adjustments, allowing precise zeroing for improved accuracy. With eight brightness settings and Diamond Coat optical coatings, the sight offers a bright, crisp reticle with excellent contrast against various backgrounds.
Its wide field of view ensures situational awareness, making it suitable for tactical, hunting, or competition shooting. Assembled in the USA, this sight comes with Leupold’s renowned customer support and a lifetime guarantee.
Key Features
- Professional-Grade Red Dot System: Unmatched light transmission, glare reduction, and clarity.
- 2.5 MOA Dot Reticle: Ideal for rapid target acquisition and precision shooting.
- Motion Sensor Technology (MST): Extends battery life by deactivating the reticle after inactivity.
- Rugged Construction: Aluminum housing with a spring steel sheath for added protection.
- Waterproof and Shockproof: Reliable performance in all conditions, rated to 33 feet of water resistance.
- Tool-less Battery Compartment: Convenient top-access battery changes.
Pros
- Exceptional clarity and light transmission for all lighting conditions.
- Durable, lightweight design with robust impact resistance.
- A wide field of view enhances situational awareness.
- Motion Sensor Technology prolongs battery life.
- Easy and precise windage and elevation adjustments.
Cons
- Shorter battery life compared to some competitors (300 hours at high settings)
6) Crimson Trace CT-RAD Open Reflex Red Dot Sight
The Crimson Trace RAD Open Reflex Pistol Sight delivers precision, durability, and versatility. With its 3 MOA red dot reticle, this optic ensures rapid target acquisition while maintaining pinpoint accuracy. Designed for seamless integration with the Docter mounting footprint, it provides a low-profile, snag-free design ideal for concealed carry or competitive shooting.
Constructed from rugged aerospace-grade 7075 aluminum, the RAD Open Reflex Sight is engineered to withstand harsh conditions, including shock, impact, fog, and vibration.
Its IPX7 water resistance rating ensures reliable performance in wet environments, while the recessed lens adds extra protection against scratches and debris. The textured sides facilitate easy slide-racking, making it highly functional for tactical scenarios.
Ease of use is another highlight of the RAD sight. Equipped with large function buttons for manual brightness adjustments, it offers precise control over the illumination levels, ensuring clarity in any lighting condition.
Additionally, the auto shutoff and sleep functions extend the impressive 40,000-hour battery life (powered by a CR1632 battery). The top-accessible battery compartment streamlines replacements without removing the sight.
Integrated co-witness sights further enhance confidence during use, combining traditional aiming methods with the modern red dot system.
Key Features
- 3 MOA Red Dot Reticle: Ensures quick target acquisition and precision.
- Rugged Construction: Aerospace-grade aluminum with recessed optics for added durability.
- Ease of Use: Manual ON/OFF, precise brightness adjustments, and a sleep function for automatic shutoff.
- Long Battery Life: 40,000 hours of runtime on a single CR1632 battery with easy top access.
- Enhanced Compatibility: Industry-standard Docter mounting interface and co-witness sight compatibility.
- Weather and Impact Resistant: IPX7 water-resistant, fogproof, and shockproof design.
Pros
- Durable and lightweight construction.
- Long battery life with energy-efficient features.
- Quick and easy installation with Docter footprint compatibility.
- Enhanced usability with textured sides for slide racking.
- Reliable performance in extreme conditions.
Cons
- Limited to a single dot size (3 MOA), which may not suit all preferences
7) Trijicon RMR Type 2 Red Dot
The Trijicon RMR Type 2 Red Dot Sight is a robust and versatile choice, making it an outstanding red dot option for the SIG P320 DH3. Renowned for its durability and adaptability, this optic features a patented housing design that diverts impact forces away from the lens, significantly enhancing its resilience.
Constructed with upgraded electronics and ruggedized battery contacts, the RMR Type 2 ensures reliable performance across military, law enforcement, self-defense, and hunting applications.
This sight features a 3.25 MOA red dot, a popular size that provides a balance of precision for longer-range shooting and quick target acquisition at closer distances. The true-color, multi-coated lens delivers clear, distortion-free imaging with minimal color shift, offering a natural view of your target area.
Additionally, the adjustable LED system allows users to toggle between manual and automatic brightness modes and features easy side-mounted buttons for intuitive control.
Designed to withstand the harshest conditions, the RMR Type 2 is waterproof up to 66 feet and constructed with tempered glass and rugged aluminum housing.
Its multi-platform compatibility makes it suitable for pistols, rifles, shotguns, and carbines, and it also functions effectively as a secondary sight alongside a magnified optic. Battery conservation is a standout feature, with an automatic adjustment mode conserving power after 16.5 hours of inactivity, delivering up to 4 years of battery life on setting 4.
Key Features
- Outstanding Durability: Patented housing design enhances impact resistance.
- True-Color Lens: Multi-coated tempered glass for natural, distortion-free imaging.
- 3.25 MOA Dot: Versatile reticle size for a range of shooting scenarios.
- Brightness Control: Adjustable LED with 8 brightness levels and manual/auto modes.
- Battery Efficiency: CR2032 battery provides up to 4 years of runtime.
- Weatherproof Design: Waterproof up to 66 feet and built to withstand extreme conditions.
- Ease of Adjustment: 1 MOA click windage/elevation adjustments with no special tools required.
Pros
- Durable construction for demanding environments.
- Long battery life with efficient power-saving features.
- User-friendly controls and multiple brightness settings.
- Suitable for a wide range of firearms and applications.
- True-color lens coatings for clear, natural-sight pictures.
Cons
- Premium price point may deter budget-conscious buyers.
Next Read: 5 Best Red Dots for SIG P365 AXG Legion
Factors to Consider when Choosing the Best Red Dots for SIG P320 DH3
When choosing the best red dots for SIG P320 DH3, several factors should be considered to ensure the optic fits your shooting needs and provides the best performance. Here are the key considerations:
Durability
Durability is essential, particularly for a pistol like the SIG P320 DH3, which may be subjected to harsh conditions in tactical or self-defense situations. A rugged design that can withstand recoil, impact, and exposure to environmental elements is crucial. Optics like the Trijicon RMR Type 2 and the Leupold DeltaPoint Pro offer exceptional durability with their shockproof, waterproof, and fogproof features.
The RMR Type 2 specifically has a patented housing shape that absorbs impacts, making it highly resistant to harsh recoil, while the DeltaPoint Pro uses aerospace-grade aluminum to ensure longevity and ruggedness in all conditions. These features make both red dots ideal for demanding use cases.
Reticle Size and Type
The reticle size and type play a significant role in quick target acquisition and shooting accuracy. A 3.25 MOA red dot is a popular choice for its balance between precision and speed, as seen in the Trijicon RMR Type 2. A dot that is too small may make it harder to acquire the target quickly, while a dot that’s too large could hinder precision, especially at longer distances.
The Crimson Trace RAD Open Reflex offers a 3 MOA dot, which strikes a similar balance, and its co-witness sight helps users maintain accuracy under various conditions. Choosing the right size dot will depend on your primary shooting needs, whether it’s for close-range self-defense or tactical applications.
Brightness Settings and Illumination Control
The ability to control the brightness of the reticle is crucial, especially in varying light conditions. Many red dots, like the Leupold DeltaPoint Pro, come with multiple brightness settings, including automatic modes that adjust based on ambient light.
The Trijicon RMR Type 2 also features easy-to-use controls for adjusting brightness manually or automatically, allowing you to tailor the sight to your environment.
Having such control ensures optimal visibility, whether you’re in bright daylight or low-light conditions, preventing washout or inadequate illumination. Optics with automatic brightness adjustments, like the Crimson Trace RAD, can help save battery life and ensure the reticle is always at the ideal brightness level.
Battery Life and Power Management
A key feature to consider is battery life. Optics such as the Leupold DeltaPoint Pro and the Crimson Trace RAD offer impressive battery longevity, with the RAD lasting up to 20,000 hours and the DeltaPoint Pro utilizing Motion Sensor Technology (MST) to extend battery life. This feature automatically powers off the sight after a period of inactivity, only reactivating when it detects movement.
Longer battery life means less frequent battery replacements, which is particularly useful for concealed carry and self-defense applications where reliability is paramount. The Trijicon RMR Type 2 also shines in this area with its power-saving modes that adjust the dot brightness to conserve battery when not in use.
Mounting Compatibility and Ease of Installation
Compatibility with your firearm’s mounting system is another critical factor. The Crimson Trace RAD utilizes the Docter mounting interface, which is compatible with a variety of firearms and makes it easy to swap between different platforms.
The Leupold DeltaPoint Pro and Trijicon RMR Type 2 are also designed with user-friendly mounting systems that accommodate a wide range of handguns, including the SIG P320 DH3.
Ensuring that the red dot is easy to mount without requiring special tools or modifications is essential for quick setup and user convenience.
Weight and Profile
For concealed carry and quick-draw scenarios, the weight and profile of a red dot sight are important factors. A lightweight and low-profile design will not add significant bulk to your firearm, maintaining the weapon’s handling and comfort.
The Crimson Trace RAD and Leupold DeltaPoint Pro are both lightweight options, weighing just about 1 ounce and featuring a low-profile design that doesn’t obstruct the user’s line of sight.
These characteristics are ideal for minimizing snagging or added weight while ensuring the red dot is unobtrusive yet effective in high-pressure situations.
Price and Value
While not necessarily a technical feature, the price-to-performance ratio is always an important consideration. Optics like the Trijicon RMR Type 2 are often priced at a premium, reflecting their advanced features and durability. However, models like the Crimson Trace RAD offer a more affordable alternative without sacrificing essential features like battery life, brightness control, and ruggedness.
When choosing the best red dot, it’s important to assess your budget and the value the optic provides in terms of performance, reliability, and overall lifespan.
Final Thoughts
In conclusion, choosing the best red dot sight for your SIG P320 DH3 depends on your specific needs, whether for tactical use, concealed carry, or target shooting. High-quality options like the Trijicon RMR Type 2 offer unmatched durability and clarity, while sights like the Leupold DeltaPoint Pro provide low-profile, advanced features that are perfect for a variety of shooting situations.
For those on a budget, the Crimson Trace RAD Open Reflex Sight delivers excellent value with long battery life and intuitive controls. Ultimately, selecting the right red dot sight comes down to factors such as reticle clarity, durability, ease of use, and battery performance, ensuring that whichever model you choose, it will enhance your shooting accuracy and experience with the SIG P320 DH3.