7 Best Red Dot Sight for FNX 45 Tactical

In the hunt for the best red dot sights for FNX 45 Tactical? If yes, this post is for you. Accessorizing your FNX 45 Tactical with a quality red dot sight comes with a plethora of benefits and we have put up this post to help you find the best model for your needs.

Red dot sights come in different designs and features to enhance your overall shooting experience. Finding the right model for your FNX 45 Tactical is crucial for optimal precision and performance in vast shooting environments. Besides, these sighting tools are essential for boosting your speed of target acquisition as a competitive shooter or tactical operator.

When making your selection, it is important to consider factors like compatibility, accuracy, and ease of use. In this product roundup, we will take you through the very best red dot sights for FNX 45 Tactical and help you decide. These sights are durable, accurate, and ideal for vast shooting applications.

Best Red Dot Sights for FNX 45 Tactical

So, without any further ado, let’s jump right in.

#1) Leupold DeltaPoint Pro Red Dot Sight – Best Overall

best red dot sight for FNX 45 Tactical



Leupold DeltaPoint Pro Red Dot Sight is hands down the best red dot sight for FNX 45 Tactical. It is a 2.5 MOA red dot sight that is optimized for versatility, performance, and durability.

The selling point of this red dot sight is its durable construction. It is constructed with an aluminum housing that is shrouded by spring steel. It is durable enough to weather the beating that comes with outdoor use, yet lightweight to ensure ease of use.

Moreover, this red dot sight provides a wide field of view with the best image quality. This aids in fast target finding and acquisition. Other than that, it boasts a Diamond Coat optical coating to boost light transmission and enhance optical clarity.

Another facet that makes the red dot sight stand out is its all-weather integrity. It is fully fog-proof, waterproof, and ideal for use in temperatures ranging from -20℉ to 120℉. Over and above that, it features a locking adjustment system to prevent unintended adjustments during use.


  • Motion sensor technology
  • 5 MOA red dot reticle
  • Aluminum housing
  • Locking adjustment system
  • Tool-less, spring-actuated battery compartment
  • 60 MOA adjustment range
  • Unlimited eye relief
  • Eight brightness settings
  • Fully waterproof and submersible to 33ft
  • Matte finish
  • Shockproof and fog-proof construction


  • Convenient battery access
  • Durable and rugged construction
  • Extended battery life
  • Versatile
  • Lightweight and easy to operate


  • Its price point is a bit steep

2) Trijicon RMR Type 2 RM01 LED Red Dot Sight – Best Rugged

best red dot sight for FNX 45 Tactical



When it comes to ruggedness and durability, you can’t go wrong with the Trijicon RMR Type 2 Adjustable LED Sight. It is designed to increase precision, accuracy, and performance with your favorite firearm in all shooting environments.

The aiming point of this optic is a 3.25 MOA red dot reticle with 1 MOA adjustment click value. The reticle is accurate across vast ranges and features dual illumination to project the perfect point of aim based on the ambient light conditions.

When it comes to construction, this red dot sight has a rugged RMR housing to handle rough use on all terrains. On top of that, the interior is fully waterproof and fog-proof to ensure unimpeded performance in all weather conditions.

What’s more, this red dot sight has infinite eye relief and a wide field of view for comfortable glassing with or without eyewear. It also brings to the table a True-Color multi-coated lens that creates bright and color-accurate sight pictures in all lighting conditions.


  • 25 MOA red dot reticle
  • Tempered glass
  • Forged aluminum construction
  • Waterproof and submersible to 66ft
  • Infinite eye relief
  • True-color multi-coated optics
  • 1 MOA adjustment click value
  • Ruggedized battery contacts


  • Outstanding durability
  • Battery-free reticle illumination
  • Exemplary clarity
  • Accurate


  • Requires practice to pick the dot

3) Vortex Optics Venom 3 MOA Red Dot Sight – Best Budget

Vortex Optics Venom 3 MOA



To get an upper hand in close-quarter combat, you need the Vortex Optics Venom 3 MOA Red Dot Sight. It is built with ease of use in mind and features a crisp 3 MOA red dot reticle for laser-sharp precision and speedy target acquisition.

Optically, the red dot sight has fully multi-coated optics responsible for enhancing light transmission. Furthermore, it boasts unlimited eye relief, true 1x magnification, and a wide-field lens that provides exceptional edge-to-edge clarity.

To complement the exemplary optical performance, this red dot sight is built with a single-piece aluminum chassis that is ultra-durable yet lightweight. On the exterior, it is coated with a Type III hard anodized finish which is corrosion and scratch resistant.

Moreover, this red dot sight is O-ring sealed for all-weather performance. It also features an Armortek protective coating that shields the lens against scratches, abrasion, dust, and stains.


  • Infinite eye relief
  • 1 MOA per click impact point correction
  • Unlimited eye relief
  • 3 MOA red dot reticle
  • Single-piece chassis
  • Type III hard-anodized finish
  • Waterproof and shock-resistant
  • Fully multi-coated optics
  • Parallax-free optical configuration


  • Ease of installation
  • Inexpensive
  • High construction quality
  • Clear sight picture


  • Light sensor location

4) Crimson Trace CTS-1550 3.5 MOA Red Dot Sight – Best Compact

Crimson Trace CTS-1550



Next on our list of the best red dot for FNX 45 Tactical is the Crimson Trace CTS-1550 3.5 MOA Red Dot Sight. This compact red dot sight is designed for concealed carry handguns and comes with an industry-standard mounting interface.

Though compact, this red dot sight is built to last. It has a shock, impact, and vibration-resistant design to weather the abuse of handgun shooting. Furthermore, it is fully fog-proof to maintain a clear field of view in all environments.

As outstanding as its construction quality is so is the reticle. The 3.5 MOA reticle is easy to spot and accurate at all distances. It is also small enough to not obstruct the small-sized targets and optimally illuminated to ensure confident aiming in different light settings.


  • LED illumination
  • High-quality polymer chassis
  • Ambient light sensor
  • 5 MOA red dot reticle
  • Open emitter
  • Notch-cut for co-witness
  • Non-reflective matte finish


  • Compact size
  • Lightweight design
  • Ease of use
  • Reasonably affordable


  • Not weatherproof
  • Short battery life

5) AT3 Tactical ARO Micro Red Dot Sight – Best for Beginners

AT3 Tactical ARO



AT3 Tactical ARO Micro Red Dot Sight is another high-quality red dot sight optimized for handgun shooting. It is packed with an array of user-friendly features that make it an ideal choice for beginners.

With a 3 MOA red dot reticle, the red dot sight allows accurate shooting with both eyes open. The brightness of the reticle adjusts into 6 different illumination settings to ensure optimal visibility in all light settings.

Furthermore, the red dot sight is built ready for outdoor use. It has waterproof and shockproof circuitry that guarantees unimpeded performance in all weather conditions. Over and above that, the sight is built with an aircraft aluminum chassis that is anodized against scratches, rust, and corrosion.

Well. that’s not all. This compact red dot sight has 1 MOA adjustment click value for the reticle and unlimited eye relief. It also brings to the table multi-coated optics that maximize light transmission and provide excellent image clarity.


  • 3 MOA reticle
  • Multi-coated lenses
  • Aircraft-quality aluminum chassis
  • Open emitter
  • Anodized finish
  • 1 MOA adjustment click value
  • Unlimited eye relief
  • Waterproof and shockproof circuitry
  • Six brightness settings


  • Great value for the price
  • Compact and lightweight
  • Accurate
  • Excellent craftmanship


  • Poor battery life

6) Sightmark Mini Shot M-Spec Reflex Sight – Most Adaptable

Sightmark Mini Shot



Here is another compact red dot sight that is optimized for versatility. It harbors a plethora of top-tier features that make it an ideal sighting tool for hunting, tactical operations, and general range applications.

This red sight is made with ease of use in mind. It comes with an ambidextrous switch that is easy to access from any shooting position. Moreover, the brightness of the reticle is adjustable to 10 daytime and 2 night vision brightness settings. This gives you the flexibility to tailor it relative to the target background and ambient light conditions.

In terms of construction, the Sightmark Mini Shot M-Spec Reflex Sight features an ultra-durable aluminum chassis with a steel protective shield. With the rigid design, you can depend on it to withstand abuse and rough handling.

To top off everything else, the red dot sight is 100% waterproof with an IP67 rating and operable in temperatures spanning from -20℉ to 160℉.


  • Steel protective shield
  • 3 MOA red dot reticle
  • 12 brightness settings
  • Aluminum housing
  • IP67 water-resistance level
  • Automatic shut-off
  • 1 MOA adjustment click value
  • Ambidextrous digital switch


  • Night vision compatible
  • Durable and well-built
  • Easy to install
  • Battery included


  • Poor battery life

7) Holosun HE407K-GR X2 6 Red Dot Reflex Sight – Best Value

Holosun HE407K-GR X2



Our last recommendation of the best red dot sight for FNX 45 Tactical is the Holosun HE407K-GR X2. It is an open reflex sight with a green illuminated dot reticle designed for concealed carry pistol applications.

The stand-out feature of this optic is the innovative technologies it employs. Firstly, it has Shake Awake technology that powers the reticle when it senses motion and powers it down when there is no motion sensed. This results in longer battery life up to 50,000 hours.

Moreover, this red dot sight is outfitted with super LED technology that delivers greater power efficiency when you are using it in the high brightness settings. It also boasts a large 6 MOA dot reticle with 12 adjustable brightness settings for visibility in different light settings.

Construction-wise, the sight is crafted with a 7075-T6 anodized aluminum chassis for ultimate durability. It is also IP67-rated against moisture and dust damage, and built for use in temperatures as low as -30°C to as high as 60°C.


  • Anodized finish
  • LED illumination
  • Open emitter
  • Multi-coated optics
  • IP67 water-resistance level
  • 30 MOA adjustment range
  • 12 brightness settings
  • Robust aluminum chassis
  • 6 MOA dot reticle
  • Shake Awake technology


  • Durable and high-quality
  • Convenient battery access
  • Clear glass
  • Easy installation


  • Battery not included

Benefits of Using a Red Dot Sight for FNX 45 Tactical

Using a red dot sight for FNX 45 Tactical provides several performance benefits for all kinds of shooting applications. These benefits include:

Fast Target Acquisition

This is the primary benefit of red dot sights for FNX 45 Tactical. They allow for speedy target finding and acquisition across vast ranges.

Ease of Use

Red dot sights have unlimited eye relief and parallax-free optical configuration, which makes them simple to operate and use. This makes them an ideal choice for users with little to no experience in firearms handling.

Fast Follow-up Shots

Moreover, red dot sights are useful for defensive shooting applications as they enable one to make fast follow-up shots.

Low-Light Performance

The adjustable brightness settings in red dot sight make shooting easy in different light settings, including low light. Besides, some of the models feature brightness settings that are compatible with night vision gear.


Red dot sights are built with versatility in mind. You can use a single model for a wide range of competitive and recreational shooting applications to improve your accuracy and overall performance.

See Also

How to Choose the Best Red Dot Sight for FNX 45 Tactical

The following are the factors you should take into consideration when shopping for a FNX 45 Tactical red dot sight.


The first thing to consider is compatibility. Ensure that the red dot sight you choose is compatible with your FNX 45 Tactical. Look at the manufacturer’s specifications and confirm compatibility before you make the purchase.

Intended Use

It is also important to consider the intended use of the red dot sight. Is it for hunting, self-defense, competitive sports shooting, or any other application? The plethora of red dot sights available on the market are ideally suited for different applications and being activity-specific will help make your selection process less tedious.

Reticle Size

In red dot sights, the size of the reticle is measured in MOA and it varies from one model to the other. Small-sized reticles are the best in terms of speed and accuracy while the large-sized counterparts are easy to spot and ideal for beginners. Consider which reticle size will work best for your specific shooting needs and choose accordingly.

Battery Life

Since most red dot sights are powered by batteries, you should pay close attention to the battery life. Opt for a model with a high-capacity battery, so you won’t have to replace it frequently.

It is also important to look at the position of the battery compartment. It could be at the side, top, or underneath. We recommend a top or side-loading battery compartment for the best red dot sight for FNX 45 Tactical.


The other important thing to consider is durability. Red dot sights with rugged all-metal construction are preferable. They can withstand the rigors of everyday use with minimal wear and tear. It is also important for the red dot sight to have waterproof, fog-proof, and shockproof features.


  • What is the best reticle size for a FNX 45 Tactical red dot sight?

It depends on your individual shooting needs and preferences. The popular options for speedy target acquisition are small-sized reticles of 3 MOA and below. On the other hand, large reticles are popular for beginners and users with aging eyes as they are easy to acquire.

  • Is FNX 45 Tactical optic-ready?

Yes. The FNX 45 Tactical pistol comes with a threaded barrel and a slide that makes it optic-ready.

  • How long is the battery life of red dot sights?

The battery life of red dot sights varies depending on usage, battery conservation features included, and the specific red dot sight. On average, most models offer 3-4 years of continuous use on a single battery.


Adding a quality red dot sight on the FNX 45 Tactical is key to enhancing its accuracy and performance. Remember that the kind of shooting you will be doing plays the biggest role in determining the model that you get. Whatever you have in mind, there is a red dot sight out there waiting for you.