5 Best Red Dots for Glock 43 X MOS

Finding the best red dots for Glock 43X MOS can significantly improve accuracy, target acquisition speed, and overall shooting performance. A quality optic enhances precision in both defensive and competitive shooting while maintaining a compact and lightweight profile suitable for concealed carry.

With advancements in technology, red dots now offer features like motion-activated illumination, long battery life, and multiple brightness settings for visibility in various lighting conditions. Choosing the right optic ensures seamless compatibility with the pistol’s slim design and enhances its effectiveness in real-world scenarios.

Not all red dots are created equal, and selecting the best one requires considering durability, lens clarity, and ease of use. A robust housing, scratch-resistant coatings, and waterproof construction contribute to long-term reliability. Battery efficiency and intuitive brightness controls are crucial for maintaining readiness, especially in self-defense situations.

Since the Glock 43X MOS has an RMSc footprint, optics must fit securely without requiring additional modifications. The right red dot balances performance, size, and features, making it an essential upgrade for those looking to maximize their Glock 43X MOS’s potential.

About the Glock 43X MOS

The Glock 43X MOS is a compact and highly versatile pistol designed for concealed carry. Chambered in 9x19mm, it features the GLOCK Slim Mounting Rail for attaching accessories and an optics-ready slide cut for micro red dots. The pistol’s slimline design provides excellent ergonomics, making it comfortable to carry and easy to handle in various shooting scenarios.

With a subcompact barrel length and a compact-size grip, the Glock 43X MOS strikes the perfect balance between concealability and control. It includes features such as a short trigger distance, a built-in beavertail frame for a higher grip, and a reversible magazine catch for ambidextrous use.

The pistol also comes equipped with the highly accurate Glock Marksman Barrel (GMB), which enhances precision with improved rifling. Additionally, the 10-round magazine, with its high-visibility orange follower, ensures reliable feeding. These features make the Glock 43X MOS an excellent platform for adding a red dot sight, enhancing its performance for both defensive and range use.

5 Best Red Dots for Glock 43 X MOS

1) Holosun HS507K-X2 Red Dot Sight

The Holosun HS507K-X2 Green Dot Sight is a top-tier optic designed specifically for subcompact pistols like the Glock 43X MOS. With its compact design, robust build, and feature-packed performance, this red dot sight enhances accuracy, speed, and overall shooting experience. Whether for concealed carry or tactical applications, the HS507K-X2 is a reliable choice for shooters seeking durability, precision, and advanced technology in a small package.

The HS507K-X2 boasts Holosun’s Green Super LED, providing a highly visible 2 MOA dot and 32 MOA circle with crisp clarity in all lighting conditions. The Multi-Reticle System (MRS) allows shooters to switch between different reticle configurations—either the 2 MOA dot, the 32 MOA circle, or both—for optimal sighting at different distances. The green reticle offers enhanced visibility compared to traditional red dots, especially in bright daylight environments.

Battery life is a standout feature, delivering up to 50,000 hours on a single CR1632 battery. The side-loading battery tray allows for quick battery replacements without the need to remove the optic, preserving zero and making maintenance hassle-free. The Shake Awake technology further extends battery life by turning off the reticle when idle and instantly reactivating it upon movement.

Constructed from 7075-T6 aluminum, the HS507K-X2 is both lightweight and highly durable, capable of withstanding harsh environments. It is IP67-rated waterproof, ensuring reliability in adverse weather conditions. The Lock Mode prevents accidental adjustments to settings, a crucial feature for everyday carry (EDC) users.

Pros

• Ultra-durable 7075-T6 aluminum housing for long-lasting performance.
• Multi-Reticle System (MRS) with 2 MOA dot, 32 MOA circle, or both.
• Up to 50,000-hour battery life with Shake Awake technology for energy efficiency.
• Side battery tray for easy replacement without losing zero.
• Lock Mode prevents unintended adjustments.
• 12 brightness settings, including 2 night vision-compatible levels.
• Compact and lightweight (only 1 oz), ideal for concealed carry.
• IP67 waterproof and shock-resistant for rugged use.

Cons

• No solar backup

2) Trijicon RMRcc Adjustable LED Red Dot Sight

The Trijicon RMRcc Adjustable LED Red Dot Sight is one of the best options for the Glock 43X MOS, offering a low-profile, snag-free design ideal for concealed carry. Engineered for durability and precision, this optic provides a crisp 3.25 MOA or 6.5 MOA red dot, allowing for rapid target acquisition in high-stress situations. Whether for self-defense, competition, or duty use, the RMRcc ensures reliable performance with eight brightness settings, including two night vision-compatible modes, giving shooters full control over their aiming experience.

Trijicon is known for producing rugged optics, and the RMRcc follows suit. Built from 7075-T6 aluminum, it features a patented, impact-resistant housing that diverts force away from the lens, enhancing its durability against drops and shocks. Its waterproof rating of 66 feet (20 meters) and shockproof construction make it a resilient choice for any environment. The True-Color Multi-Coated Lens enhances clarity while reducing distortion, ensuring a bright, crisp sight picture.

With eight brightness levels, including a super bright mode and two night vision settings, the RMRcc adapts seamlessly to various lighting conditions. The auto-brightness lock-out mode secures the automatic adjustment feature, while the lock-in mode allows users to keep their preferred brightness setting indefinitely. Powered by a CR2032 battery, this sight delivers an impressive four-year battery life at medium brightness settings, minimizing maintenance concerns.

Adjusting windage and elevation is tool-free, with each click moving the point of impact by 3 MOA, making quick adjustments effortless. The wide field of view and parallax-free design enable both-eyes-open shooting, improving situational awareness and speed.

Pros

• Ultra-durable 7075-T6 aluminum construction
• Low-profile, snag-free design perfect for concealed carry
• Crisp and precise 3.25 or 6.5 MOA red dot for fast target acquisition
• Eight brightness settings, including two night vision modes
• Waterproof up to 66 feet (20 meters) and shockproof
• Tool-free windage and elevation adjustments
• Up to four years of battery life on medium settings
• Auto-brightness lock-out and manual lock-in modes

Cons

• Higher price compared to some competitors

3) Shield Sights RMSc Reflex Mini Sight

The Shield Sights RMSc Reflex Mini Red Dot Sight is a top-tier optic designed specifically for compact and single-stack pistols like the Glock 43X MOS. With its slim, lightweight profile and rugged build, it is an excellent choice for concealed carry users seeking a reliable red dot sight that enhances accuracy without adding bulk. Unlike traditional glass optics, the RMSc features a clear polymer lens capable of withstanding up to ten times greater shock impact, making it one of the most durable options available.

Crafted from aerospace-grade aluminum with an anodized matte black finish, the RMSc is built for durability while maintaining a sleek and discreet appearance. Unlike many red dot sights, it lacks a red reflective filter on the lens, minimizing its visual signature and reducing glare. The 8 MOA dot provides a large, crisp aiming point, ideal for rapid target acquisition in defensive situations.

The RMSc features an automatic brightness adjustment system, which senses ambient light levels and adjusts the LED output accordingly. This ensures optimal dot visibility against different backgrounds, from bright daylight to low-light environments. With its parallax-free design and unlimited eye relief, shooters can maintain fast and accurate aiming with both eyes open.

Battery life is impressive, with an average runtime of two to three years under regular use and up to four years in dark storage. However, the battery compartment is located underneath the sight, requiring removal for replacement, which may be a minor inconvenience for some users. The RMSc is compatible with existing RMS and SMS mounts, making it easy to integrate with various setups.

Pros

• Ultra-lightweight and compact design, ideal for concealed carry
• Durable polymer lens that resists extreme shock impact
• No red reflective coating for a reduced visual signature
• Automatic brightness adjustment for optimal dot visibility
• Large 8 MOA dot for quick target acquisition
• Parallax-free with unlimited eye relief
• Long battery life of 2-3 years under regular use
• Compatible with RMS and SMS mounts

Cons

• Battery placement requires unmounting for replacement

4) SIG Sauer ROMEO Zero Elite 1x24mm 3 MOA Red Dot Sight

The SIG Sauer ROMEOZero Elite 3 MOA Red Dot Sight is a top-tier micro red dot designed for compact pistols like the Glock 43X MOS. It offers significant upgrades over its predecessor, making it a premium choice for concealed carry and defensive applications. Its ultra-lightweight carbon-infused polymer housing provides exceptional durability while keeping weight to a minimum, ensuring minimal impact on firearm balance.

A standout feature is the aspherical glass lens, which delivers a crystal-clear, distortion-free sight picture, a notable improvement over polymer-based alternatives. This ensures precise aiming and faster target acquisition, especially in high-stress situations. The ROMEOZero Elite also includes a hardened steel protective shroud, reinforcing the optic against drops and rough handling, making it one of the most rugged red dots in its class.

One of the most user-friendly aspects of the ROMEOZero Elite is its T.A.P. (Touch-Activated Programming) technology. This allows for quick brightness and reticle adjustments with a simple tap, eliminating the need for complex button navigation. The optic features eight brightness settings, providing versatility in various lighting conditions. Additionally, the rear housing includes anti-reflection grooves and a backup rear sight notch with Grade A Swiss SuperLuminova pigment for enhanced visibility in low-light environments.

With a battery life of up to 20,000 hours on a single CR1632 battery, the ROMEOZero Elite ensures long-lasting performance without frequent replacements. Its Shield RMSc footprint makes it directly compatible with the Glock 43X MOS and Springfield Hellcat OSP, ensuring a seamless fit with factory-cut slides.

Pros

• Ultra-lightweight and durable carbon-infused polymer housing
• Scratch-resistant aspherical glass lens for a clear, distortion-free view
• T.A.P. technology for quick, intuitive brightness and reticle adjustments
• Eight brightness settings for versatile use in different lighting conditions
• Reinforced steel shroud for added durability
• Backup rear sight notch with SuperLuminova for low-light aiming
• Long battery life of up to 20,000 hours
• Direct fit for Glock 43X MOS and other RMSc footprint pistols

Cons

• No manual windage and elevation locking system

5) Swampfox Sentinel II 1×20 Dot Sight

The Swampfox Sentinel II 1×20 Dot Sight is a cutting-edge red dot designed specifically for concealed carry pistols like the Glock 43X MOS. With its RMSc footprint and slim profile, it provides an excellent balance of compactness and visibility, making it a strong contender for one of the best red dots for micro pistols.

One of the standout features of the Sentinel II is its 20mm objective lens, which offers a larger window compared to many competitors in the same class. This expanded field of view ensures faster target acquisition without compromising concealability. The optic also boasts a patented removable rear sight guide, a unique addition that assists shooters who have sacrificed traditional iron sights for a red dot setup. This guide helps align the eye to the reticle quickly and provides additional visual support in high-stress situations.

Built for real-world durability, the 7075 aluminum housing ensures a lightweight yet extremely tough construction, capable of withstanding 1500 Gs of shock. The rugged enforced hood design adds an extra layer of protection, while anti-glare serrations reduce unwanted reflections that could obscure your sight picture. The multi-coated, hydrophobic, and anti-fog lens keeps your sight clear in various environmental conditions, making it reliable in both humid and rainy conditions.

Functionality is another highlight of the Sentinel II. It features 10 brightness settings, including night vision compatibility, ensuring adaptability in all lighting conditions. Additionally, its Shake N’ Wake auto on/off function conserves battery life by putting the optic to sleep when not in use and instantly activating it when motion is detected. This grab-and-go readiness is ideal for everyday carry and self-defense scenarios.

Pros

• 20mm objective lens for an improved field of view
• Slim RMSc footprint fits the Glock 43X MOS perfectly
• Patented removable rear sight guide for better dot acquisition
• 10 brightness settings with night vision compatibility
• Shake N’ Wake auto on/off feature for extended battery life
• Durable 7075 aluminum housing with 1500 G shock resistance
• Hydrophobic and anti-fog lens coating for all-weather reliability
• Rugged enforced hood design with anti-glare serrations

Cons

• Shake N’ Wake feature may take time to get used to

Factors To Consider When Buying The Best Red Dots for Glock 43 X MOS

Footprint Compatibility

The Glock 43X MOS is designed to accommodate micro red dots with the RMSc footprint. When selecting a red dot, ensuring it is compatible with this mounting standard is crucial. Some optics may require adapter plates or modifications, which can add complexity and cost. A seamless fit not only simplifies installation but also ensures proper sight alignment and reliability in real-world use.

Lens Size and Field of View

A red dot with a larger lens provides a wider field of view, allowing for faster target acquisition and improved situational awareness. However, compactness is essential for a concealed carry pistol, so the balance between a wide window and a slim profile is key. A lens that is too small may make finding the dot slower, while a larger one could impact concealability and weight.

Reticle Type and Brightness Settings

The choice of a red dot’s reticle can impact precision and speed. A 3 MOA dot is common, offering a good balance between accuracy and rapid aiming, while some models feature a circle-dot combination for even faster target acquisition. Adjustable brightness settings, including night vision compatibility, ensure visibility in all lighting conditions, from bright daylight to low-light environments.

Durability and Material Construction

A red dot sight must withstand recoil, drops, and harsh conditions, especially on a concealed carry firearm. Optics built with aircraft-grade aluminum or reinforced polymer housings provide enhanced durability without adding excessive weight. Shock-resistant construction ensures the sight remains functional even after rough handling, making it a reliable choice for daily carry.

Power Source and Battery Life

Long battery life is essential for a red dot sight, as frequent battery changes can be inconvenient and compromise readiness. CR1632 and CR2032 batteries are common choices, with some optics offering up to 20,000 hours of runtime. Features like auto shutoff or motion-activated wake functions help conserve battery life, ensuring the sight is always ready when needed.

Ease of Adjustments and Controls

User-friendly controls are vital for adjusting brightness, reticle settings, and zeroing the optic. Some red dots feature touch-activated programming, while others use buttons or dials. The ability to quickly adjust settings without disrupting focus on the target can be beneficial, particularly in high-pressure situations where split-second decisions matter.

Coating and Optical Clarity

The quality of the lens coating affects how clearly the shooter can see the reticle and target. Multi-coated, anti-reflective, and hydrophobic coatings reduce glare, fogging, and distortion, ensuring a crisp sight picture in varying weather conditions. A scratch-resistant lens also helps maintain long-term durability and performance, preventing damage from daily wear and tear.

Backup Sight Integration

Since many micro pistols lack traditional iron sights once a red dot is installed, having an optic that integrates a backup rear sight can be beneficial. Some designs incorporate rear sight guides or markings to help shooters maintain a point of reference in case of a malfunction. This added feature enhances reliability, ensuring the ability to aim effectively even if the red dot fails.

Best Red Dots for Glock 43 X MOS Frequently Asked Questions

1) What is the best MOA size for a red dot on the Glock 43X MOS?

A 3 MOA dot is a popular choice for the Glock 43X MOS because it provides a good balance between precision and fast target acquisition. A smaller dot, like 2 MOA, offers finer aiming for longer distances, while a larger dot, such as 6 MOA, is quicker to pick up at close range but may cover more of the target.

2) How important is battery life when choosing a red dot for the Glock 43X MOS?

Battery life is crucial, especially for a concealed carry or self-defense firearm. Look for red dots with at least several thousand hours of runtime, preferably with motion-activated wake-up features to extend battery life. This ensures the sight is always ready when needed without frequent battery replacements.

3) Do I need suppressor-height backup sights with a red dot on the Glock 43X MOS?

While not always necessary, suppressor-height iron sights can be useful as a backup in case the red dot fails. Some red dots include built-in rear sight guides to assist with aiming if the optic is temporarily out of commission. If your red dot sits high on the slide, taller sights may help co-witness with the optic for added reliability.

Conclusion