Check out this list of 5 best red dot sights for FN Reflex Micro, expertly tested for compatibility, field of view, long battery life, dot options, and price. 

After testing so many red dot sights in the past 7 years, here are what we believe to be the best for the new FN Reflex Micro optics ready subcompact pistol for range use and concealed carry.

Let's check them out below:

Best FN Reflex Micro Red Dot Sights

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  • Best Overall
  • Best for CCW
  • Best For The Money
  • Best For Astigmatism
  • Best Auto Dimming

Holosun 507K X2 - Best Overall


Highly recommend milled slide mount for the BEST fit without losing zero

The Holosun HS507K X2 micro RMSc red dot sight is one of the best red dot sight for FN Reflex Micro and it fit flush with the width of the slide.

Fast Target Red Dot Acquisition - Similar red dot tracking experience as the full size 507C but much slimmer width

Snag free holster draw - The red dot sight can go in and out of the holster smoothly without getting in the way for IWB and OWB holsters.

Activates Red Dot via Motion Sensor - The ShakeAwake technology can deactivate the red dot when not in use to save battery, and it activates it upon movement immediately

Simple battery change without hassle - Access battery from the side tray instead of the bottom. No sight removal or re-zeroing required


  • Magnification: 1X
  • Reticle: 2 MOA dot, 32 MOA ring, or combined
  • Turret Value: 1 MOA / Click
  • Field of View: 0.58" X 0.77"
  • Construction: 7075 T6 aluminum IP67 rated
  • Dimension: 1.6" X 0.98" X 0.95"
  • Weight: 1 oz
  • Battery Life: 50,000 hours


  • Perfect fit
  • Very durable for self defense use
  • Reticle lock out mode for concealed carry


Open emitter design attracts dirt

Holosun EPS Carry - Best For CCW

eps carry

The Holosun EPS Carry is full weatherproof and it directly mounts on the optic ready FN Reflex The installation requires the RMSc adapter plate that comes with the EPS Carry.

Fully Closed Emitter - No debris can enter the optic, so it's full weatherproof under all weather conditions

Recommend 6 MOA Dot - The 6 MOA is big to see and appears rounder for shooters with astigmatism

No Lens Distortion - No edge to edge distortion that could affect the target sight picture, so the shooter can get a perfect point of aim when shooting with both eyes open

Side Battery Access - It's very easy to swap the battery without sight removal or rezeroing

K Pattern Mounting Footprint - Be sure to use the RMSc adapter plate to mount the optic onto FN Reflex optics ready slide


  • Magnification: 1X
  • Reticle: 2 MOA, 6 MOA or MRS
  • Turret Value: 1 MOA / Click
  • Window Size: 0.58" X 0.77"
  • Construction: 7075 T6 aluminum IPX8 rated
  • Dimension: 1.62" X 1.07" X 0.95"
  • Weight: 1 oz
  • Battery Life: 50,000 hours


  • RMSc plate fits super tight on the slide with recoil lugs
  • No slide modification required
  • Full weatherproof for concealed carry
  • Side loading battery


  • Turret tool required to dial MOA in the field

Swampfox Sentinel - Best For The Money

swampfox sentinel

The Swampfox Sentinel is one of the top selling red dots for FN Reflex slide without any mod. It's not the ultimate red dot, but for the money it's a great red dot sight for range use.

7075 Body - Hard coated 7075 T6 aluminum body can withstand drop and 9mm recoil with no issue

Extra Protection - The user can choose to mount the IRONSLIDES SHIELD to protect the lens hood from barricade racking, drop and other physical impact to protect the internals.

No Field Of View Obstruction - Aim with both eyes open without thick lens frame getting in the way 

Manual Model -  Shake ‘N Wake motion sensing preserves battery life when Sentinel-M has been still for about 4 minutes. With new motion, Sentinel-M resumes its previous brightness level. Highly recommend manual version for indoor low light use. 

Auto Model - A photosensitive ambient light sensor provides dot brightness relative to ambient lighting conditions. There are no manual controls at all.


  • Magnification: 1X
  • Reticle: 3 MOA
  • Turret Value: 1 MOA / Click
  • Field of View: 1X16mm
  • Construction: 7075 T6 aluminum 
  • Dimension: 1.61" X 0.91" X 0.94"
  • Weight: 0.62 oz
  • Battery Life: 50,000 hours

Swampfox Sentinel Review


  • Easiest RMSc red dot optic to install
  • Recoil proof on snappy 9mm subcompact pistol recoil


  • Thin lens frame
  • Reticle flickers when facing direct sunlight
  • Non physical or audible feedback MOA turrets

Shield RMSc - Best For Astigmatic Eyes

shield rmsc red dot sight

The Shield RMSc works on the FN Reflex Micro and the best part is that Shield offers The 4 or 8 MOA dot model which is great for users with astigmatism. The optic is powered by one CR2032 battery that lasts about 2 years and the bigger MOA dot option is always easier to see and appears rounder with reduced emitter glare.

Slim Overall Width - Fits flush on the FN Reflex Micro optics ready slide. Looks great, feels great and built tough.

Polymer lens for endurance - Withstand up to 10X greater shock impact than glass optics plus minimal lens reflection

Super lightweight - Carry the optic on your FN Reflex Micro any where you go without feeling like there is any added weight on you. 


  • Magnification: 1X
  • Reticle: 4 or 8 MOA
  • Turret Value: 1/4 inch at 20 yards
  • Construction: Aircraft aluminum 
  • Dimension: 1.7" X 0.9" X 0.9"
  • Weight: 0.57 oz
  • Battery Life: 2 - 3 years


  • Directly fits on FN Reflex Micro slide
  • Long battery life
  • Skeletonized lens frame to reduce weight
  • Polymer glass or glass models offered


  • Much expensive than others recommended 
  • Bottom battery installation

Springfield HEX WASP - Auto Dimming Sensor


The Springfield Armory Hex WASP micro red dot sight is super lightweight (0.7 oz), and this red dot sight features serration cuts on the side of the body for better grip friction if dealing with mud or wet hand.

Thick Lens Frame - Withstand slide racking against hard surfaces with much more durability

Finer MOA Dot Adjustment - The WASP features a 0.5 MOA / Click for finer adjustment to be more accurate turret adjustment

Automatic brightness adjustment - The light sensor detects ambient light sources and it adjusts the brightness to suit indoor and outdoor use without having to touch any buttons


  • Magnification: 1X
  • Reticle: 3.5 MOA
  • Turret Value: 0.5 MOA / Click
  • Field of View: 1X16mm
  • Construction: 6061 T6 aluminum IPX7 Rated
  • Dimension: 1.6" X 0.95" X 0.86"
  • Weight: 0.7 oz
  • Battery Life: 65,000 hours with auto dimming