6 Best Red Dot for Glock 43X MOS

When it comes to handgun shooting, there is virtually no handgun that matches the accuracy the Glock 43x MOS offers. It is an excellent upgrade of the Glock 43X and the presence of both the optic-ready rail makes it even more capable than the older counterpart. In today’s post, our focus will be on the very best red dot for Glock 43X MOS available on the market today.

MOS is an abbreviation for Modular Optics System. The Glock 43X MOS bears this system that makes it compatible with a wide range of red dot sights. When you mount a quality red dot sight on this handgun, you will not only enhance your shooting accuracy, but also boost your overall shooting confidence.

However, you can not add any red dot on the Glock 43X MOS. This handgun is compact so the red dot you get should be equally compact. Additionally, the red dot sight should be ultra-light to not add any unnecessary weight on the pistol or interfere with how easy to conceal it is.

We have done the hard work for you and put together a list of the best performing red dots that pair well with the Glock 43X MOS. Moreover, we have included a detailed buying guide with the essential factors you need to consider when making your selection.

But first, let’s begin by looking at the attributes that make a great red dot sight for Glock 43X MOS.

What Makes a Good Red Dot for Glock 43X MOS

A great red dot sight for Glock 43XMOS is made of a wide range of features and the first one is compact size. Glock 43X MOS is such a compact but powerful handgun so you will need a sighting tool that is ultra-compact.

Furthermore, the red dot sight should be lightweight and durable. A lightweight sight will not affect the precision of the handgun or add any unnecessary extra bulk. The sight should also have a ruggedized construction to endure that rough use that comes with handgun shooting and be operable for many years.

The other important features that the best red dot for Glock 43X MOS should have include:

  • Multiple brightness settings to keep the reticle visible in different lighting conditions
  • Wide and unobstructed field of view for quick target finding
  • Unlimited eye relief to allow for both eyes open shooting and ensure great comfort during use
  • A long battery life
  • A battery compartment that allows for easy change of the battery without having to dismount the sight from the handgun
  • Solid lens coatings to enhance the brightness and clarity of the dot and target views

Best Red Dots for Glock 43X MOS -Top Picks

If you are looking for the best red dot for the Glock 43X MOS, here is a list of some of the best-rated models to choose from. Let’s take a look.

1) Holosun HS407K-X2 Classic Reflex Red Dot

best red dot for Glock 43X MOS



Holosun HS407K-X2 is by far the best red dot for Glock 43X MOS available out there. It has an ultra-compact size that fits on the pistol perfectly and a wide glassing window which is important for boosting the shooters target acquisition speed.

This optic is built for use in all lighting conditions. It has an aiming point of 6 MOA with 12 different brightness settings. The two lowest brightness settings are compatible with night vision devices while the other 10 are ideal for daytime shooting.

Furthermore, the sight features a Shield RMS footprint for quick and easy installation as well as removal. Besides that, it boasts unlimited eye reticle to ensure comfortable glassing and parallax-free optics to ensure great precision. The optics also feature premium anti-reflective coatings to increase light transfer and minimize internal reflection that leads to glare.

Another remarkable facet of the sight is premium build quality. It has an anodized 7075-T6 aluminum body that is shockproof and resistant to vibrations up to 5000G. The entire optic is also IP67 waterproofed for use in different environments and temperatures ranging from -30°C to 60°C.


  • 6 MOA red dot reticle
  • Shield RMS footprint
  • 10 daylight and 2 night vision brightness settings
  • Waterproof and dustproof
  • Anodized 7075-T6 aluminum body
  • Unlimited eye relief
  • Shake Awake technology
  • 1 MOA impact point correction


  • Long battery life
  • Easy to install and use
  • Ultra-lightweight design
  • Compatible with night vision gear


  • Durability issues

2) Trijicon RMRcc Sight Adjustable LED Red Dot

best red dot for Glock 43X MOS



To better your precision with your handgun, you need a reliable sighting tool like the Trijicon RMRcc Sight. It is built with a crisp 3.25 MOA reticle that simplifies the point of aim. This reticle has its brightness intensity adjustable into 8 different settings to ensure optimum visibility in different lighting environments.

This optic is designed with user convenience in mind. First, it has tool-less windage and elevation adjustments for the on-go precision. Furthermore, it is easy to install and has a snag-free design that make it not just easy to carry, but also very simple to draw.

Trijicon optical devices are known for their rugged construction and this sight is not any different. It is built with ruggedized battery contacts and electronics that maximize performance and survivability in harsh environments. It also boasts impact-resistant tempered glass and a robust 7075 aluminum housing to maximize durability.

Optically, this sighting tool has True-Color multi-coated optics that yield incredibly bright and crisp image views in virtually all lighting conditions. Besides that, the optical tube is sealed against dirt, moisture and dust for all-weather use.


  • 25 MOA reticle
  • True-Color multi-coated optics
  • Tempered glass
  • Waterproof and submersible to 66ft
  • 1 MOA impact point correction
  • 7075 aluminum housing
  • 8 brightness settings


  • Easy to adjust windage and elevation
  • Solid build
  • Easy to install, use and carry
  • Great battery life


  • High cost

3) SIG SAUER Romeo Zero Red Dot Sight

sig sauer



SIG SAUER 9mm Romeo Zero Sight is the best red dot for Glock 43X MOS for beginners and any budget conscious buyer out there. It is incredibly easy to use and packed with a wide range of great features at a fairly decent price.

This red dot sight is compact but optimized for durability. It has a SpectraCoat HD polymer lens that offers over 10 times greater impact resistance than traditional glass lenses. Over and above that, it boasts a ruggedized body to stand to whatever punishment you throw at it.

Another highlight of this optic is the Motion Activated Illumination System. This system powers up the sight only when it senses motion to save on battery life. Furthermore, a highly efficient LED emitter is included to provide a dot that is 8 times crisper and more efficient than conventional red dots.

The other noteworthy features the sight brings to the table include 8 vivid user-configurable daytime illumination settings, parallax-free optics and an unrivaled 10 year battery life.


  • Textured finish
  • Direct mount for easy installation
  • Highly efficient LED emitter
  • 8 adjustable brightness settings
  • SpectraCoat HD polymer lens
  • Motion Activated Illumination System


  • Compact and lightweight design
  • Long battery life
  • Easy to install and use
  • Large, clear sighting window


  • The housing is made of plastic

4) Swampfox Sentinel Micro Reflex Red Dot

Swampfox Sentinel




Swampfox Sentinel 1x16mm is another ultra-compact red dot sight that works really well with the Glock 43X MOS. The sight features a 3 MOA red dot reticle that provides the ultimate balance between speed and accuracy, and makes the sight ideal for a wide range of shooting applications.

A defining feature of this micro reflex red dot sight is the dual day and night functionality. It has 10 adjustable brightness settings that keep the reticle visible in various lighting conditions. On top of that, the lenses are fully multi-coated to enhance the transmission of light when you are shooting in low light environments.

To complement the incredible optical performance, the sight features a robust 7075-T6 aluminum body that shields the optics from impact and damage. Besides, the entire optic is shockproof to endure any abuse you subject it to. It also has an IPX7 waterproof and dustproof rating for all weather reliability.


  • Fully multi-coated optics
  • 10 adjustable brightness settings
  • 3 MOA dot reticle
  • Parallax free at 33 yards
  • IPX7 waterproof and dustproof rating
  • Ruggedized 7075-T6 aluminum body
  • Photosensitive sensor
  • Shake N Wake system


  • Compatible with night vision
  • Excellent craftmanship
  • Easy to mount and dismount
  • Compact, ultra-light and portable


  • The coating is not scratch proof

5) Aimpoint Optics X3 Tactix MPRD Red Dot Sight




The Aimpoint X3 Tactix MPRD Red Dot Sight incorporates advanced technology and top-grade features to provide a sighting tool that is nothing short of incredible. Though compact, the sight has every feature you need to better your shooting skills and optimize the performance of your handgun.

7 of the 16 brightness settings the sight comes with are night vision compatible for use with night vision gear. The other 9 settings are ideal for daylight shooting even in extreme bright sunlight. This gives you the flexibility to use the sight in all lighting environments.

Furthermore, the sight boasts a crisp 2 MOA red dot reticle that yields stunning accuracy for both close combat and long range engagements. It is also waterproofed for all weather reliability and submersible to 150ft for extra protection in case if falls in water accidentally.

Regarding construction, Aimpoint built the sight to offer long term durability. It has a sturdy and durable aluminum body that is rigid enough to stand up to shock, vibration and rough handling.

In addition to everything else, this optic is built with multi-coated optics to provide a bright and clear field of view by ensuring high levels of light transmission.


  • QRP2 mount
  • Unlimited eye relief
  • 2 MOA red dot reticle
  • Waterproof and submersible to 150ft
  • Multi-layer anti-reflective lens coating
  • Sturdy aluminum housing
  • Semi-matte anodized finish
  • 16 brightness settings


  • Compatible with all night vision devices
  • Large, unobstructed field of view
  • Long battery life
  • Premium build quality


  • Pricey

6) Shield Sights Compact Reflex Mini Red Dot Sight

Shield Sights


Lastly on our list of the best red dot for Glock 43X MOS is the Shield Sights Compact Reflex Mini Red Dot Sight. This red dot sight boasts a ton of superb features and modern technology packed in a compact size that fits flawlessly on this handgun.

The sight is built with parallax-free optics and a large sighting window to reduce the time it takes for shooters to find and acquire targets. Besides that, it is designed with red reflective filter on the lens to minimize visual signature. It also has a variable intensity drive circuit that controls the brightness level of the red dot instantly after sensing the light levels the target is in.

Furthermore, the sight is made with user convenience in mind. It comes with an optional battery draw that allows for easy change of the battery while the sight is still mounted on the handgun. It also has a completely eye safe laser and a 4 MOA red dot reticle that is not just accurate, but also easy to spot even with aging eyes.

To top it all off, the sight is made with polymer optics and an anodized aluminum body to offer unrivaled durability.


  • 4 MOA red dot reticle
  • Anti-reflective optics coating
  • Variable intensity drive circuit
  • Eye safe laser
  • Anodized aluminum body
  • Parallax-free optics


  • Highly effective automatic brightness setting
  • Crisp clear dot
  • Rugged and reliable construction
  • Perfect finish and function


  • Fitting issues

Read Also

Things to Look for in a Red Dot for Glock 43X MOS

Buying a red dot for Glock 43X MOS is not something you do in a hurry. When making your selection, take into account these important features.

Size and Weight

In red dot sights, size and weight go hand in hand. The Glock 43X MOS is a very compact handgun. This calls for a red dot sight that is equally small in size. Additionally, the best red dot for Glock 43X MOS should have a lightweight construction so as not to add any weight on the handgun.


The reticle size in red dot sights is measured in MOA. Red dot sights that are built with a large MOA are ideal for users with aging eyes or poor eyesight. Such reticles are easy to spot and only ideal for close range applications.

On the other hand, red dot sights with smaller MOA reticles are slightly harder to spot compared to the larger counterparts, but the best in terms of precision and speed. If accuracy and speed is what you need for your handgun, go for a device that has a small red dot of 4 MOA and below.

Battery Life

The next thing to take into account is battery life. The longer the battery life a red dot sight has the better. It will keep the optic running for hours and minimize the odds of it failing in the middle of use.

In addition to long battery life, consider the placement of the battery compartment. A tip is to get a device that has a top or side placed battery compartment. Such red dot sights allow for easy battery change while the optic is still mounted on the handgun.

Overall Build Quality

Build quality of a red dot sight is the other important thing to consider. A tool that is built with top-notch materials will withstand rough use and offer many years of reliable performance. Such optics are either made from magnesium alloy or aircraft quality aluminum.

The best red dot for Glock 43X MOS should also be built ready for use in any environment. This means that the optical tube should be fog proof, waterproof and dustproof as well.

Optics Coating

If the red dot sight doesn’t provide a clear view of the targets, it will be hard for the shooter to know where to place the shot. This is where optical coatings come in to play. A red dot sight with premium anti-reflective lens coatings will reduce internal light reflection that causes glare. As a result, more light is transmitted and the red dot sight yields bright and clear image views.


  • Is it worth putting a red dot on Glock 43X MOS?

Yes, it is. Putting a red dot sight on your Glock 43X MOS pistol will boost both your shooting confidence and accuracy. The simplified point of aim that red dots provide will also reduce the time you take to acquire targets, even in the most unforgiving shooting environments.

  • What size red dot is best for Glock 43X MOS?

The best red dot size to put on Glock 43X MOS depends on several factors that include individual preference and shooting needs. A large 6 MOA red dot is the best for seniors and other users with poor eyesight as it is easier to use. On the other hand, tactical shooters who are after speed and precision will benefit more from a model with a smaller red dot of 3 MOA and below.


Using a red dot on your Glock 43X MOS will go a long way to help you push your handgun to its full performance. You will be able to shoot better at distances above 15 yards and significantly reduce the time you take to acquire targets no matter the kind of shooting you will be doing.

Choosing the best red dot for Glock 43X MOS will have you going through a ton of models from different brands, but whatever your needs are, there is a model out there waiting for you.