best glock 43 red dot sights

Here are the 6 best Glock 43X MOS red dot sights that are compatible.

We've narrowed them down based on compatibility, battery life, durability and price.

Best Red Dot For Glock 43X MOS

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  • Best Overall
  • Full Weatherproof
  • Best For The Money
  • Best For Beginner
  • Best Durability

Holosun 507K X2 - Best Overall

best red dot for glock 43x

Rear index post removal required on the factory Glock 43X MOS slide to fit. Highly recommend using the CHPWS adapter plate with recoil lugs

The Holosun 507K is designed for thin handguns and fits the Glock 43X slide perfectly without hanging over the edges.

Simple battery change without hassle - You can change the battery from the side, so you don't need to take off the sight from the slide.

holosun 507k x2 battery access door

Activates via motion sensor - The Holosun's ShakeAwake feature turns on the reticle when you move it and turns it off when it's still to save battery.

Rugged Exterior Housing - It's like an RMR that can withstand drop impact, and it provides snag-free conceal carry holster draw in and out of IWB or OWB holsters.

holosun 507k x2 pov

Fast Reticle Acquisition - Highly recommend using a suppressor height front sight co-witness to pick up the dot faster without missing the dot


  • Magnification: 1X
  • Reticle: 2 MOA dot, 32 MOA ring, or combined
  • Turret Value: 1 MOA / Click
  • Window Size: 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


  • Side battery access without sight removal
  • Very long battery life
  • Features Shake awake technology
  • Small for CCW
  • Durable front lens construction


  • MOA adjustment requires a small flat head screw driver
  • Motion sensor for the purpose of saving battery maybe be not so useful for CCW

Holosun EPS Carry - Best Weatherproof

glock 43X MOS holosun EPS carry

The Holosun EPS Carry must use the K to RMSc adapter plate to mount on the Glock 43X MOS slide. 

Closed Emitter - Fully weatherproof against dirt, water and other debris

Side Battery Access - Insert the battery from the side without sight removal

6 Reticle Systems - 2 MOA, 6 MOA and mutli reticle system with 32 MOA ring (with solar failsafe). Sold separately

No Lens Distortion - Refined glass window without edge distortion


  • 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


  • Very durable for carry
  • Full weatherproof
  • Prevents accidental button adjustment in lock out mode
  • Very long battery life
  • No lens distortion
  • No recoil lug trimming required


  • Turret tool required to adjust MOA

Cyelee Cat Pro - Best For The Money

glock 43x cyelee cat pro

Durable Frame - The CAT Pro's lens frame is thick and rugged for the range and daily carry 

Side Battery Access - No sight removal required for swapping the battery

Multiple Reticle Systems - 2 MOA single dot is pretty standard. The 25 MOA ring is actually very crisp to aim with for users with astigmatism

No Lens Distortion - Refined glass window without edge distortion


  • Magnification: 1X
  • Reticle: 2 MOA + 25 MOA Ring
  • Turret Value: 1 MOA / Click
  • Footprint: RMSc
  • Window Size: 0.65" X 0.83"
  • Construction: 7075 T6 
  • Type: Open emitter
  • Weight: 1 oz
  • Battery Life: 50,000 hours


  • Very durable 
  • Lightweight
  • Very long battery life


  • Turret tool required to adjust MOA

Trijicon RMRcc - Best Durability

brownells glock 43 rmrcc slide

The Trijicon RMRcc has the same RMR durability and it's for the single stack Glock 43X MOS. In order to mount the RMRcc on the Glock 43X, there are two options:

RMRcc vs RMSc footprint

Reduced 0.2" for slimmer profile - Fits flush on the Glock 43's slim slide. It works better for custom milled slide so the optic can lock in very tight.

No to accidental brightness adjustment -The new “LOCK-OUT” Mode settings secures the setting regardless of bumping or rubbing against clothing when concealed.

glock 43x with trijicon rmrcc

No compromise in durability - The new RMRcc still uses the same grade material, circuitry, functionality the RMR is known for

Upgraded electronics - The tighter battery grip prevents the battery from getting lose due to drops, bumps or repeated recoils

Highly recommend using a suppressor height front sight to co-witness for faster dot acquisition.


  • Magnification: 1X
  • Window Size: 0.5" X 0.74"
  • Reticle: 3.25 or 6.5 MOA
  • Turret Value: 3 MOA / click
  • Construction: 7075 T6 forged aluminum
  • Dimension: 1.8" X 0.95" X 0.97"
  • Weight: 1 oz
  • Battery: 1 CR2032 battery
  • Battery Life: 2 - 3 years


  • As durable as the original Trijicon RMR
  • Prevents accidental button adjustment in lock out mode
  • Very long battery life
  • Very slim fit just like the Holosun 507K


  • Milling required (Doesn't fit RMSc footprint)
  • Bottom battery access
  • Hard to pick up the dot without a tall front sight to co-witness

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Shield RMSc (Aluminum Body) - Lowest Profile

red dot for glock 43x mos

Why should you consider the Shield RMSc? Firstly, it seamlessly fits the Glock 43X since it adopts the same mounting design as the original RMS red dot. Its streamlined structure ensures it aligns perfectly with the slide, preventing any awkward protrusions. 

Perfect for single stack pistols -  this design fits neatly on the Glock 43X's slide due to its slim aluminum frame. It not only looks sleek but is also robustly built.

Polymer lens optic for increased durability - The RMS uses a durable polymer lens, offering a clear, parallax-free view. This lens can handle impacts up to ten times better than those with glass optics. Plus, without a red reflective filter on its lens, the RMS offers a subtle visual appearance.

Super lightweight - The optic only weighs 0.57 oz with 1 battery installed, which makes a great concealed carry option.

Powered by one CR2032 battery - The battery lasts about 2-3 years (recommended to switch out every year).

4 or 8 MOA size dots - 4 MOA dot is recommended.


  • 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


  • Skeletonized body to reduce weight
  • Offers bigger dots than just 3 MOA or 6 MOA
  • Great for single stack pistols


  • A bit pricey for what it does

Swampfox Sentinel - Best Value

glock 43x red dot

The Swampfox Sentinel is one of the top selling Glock 43X red dot at a good price point. It mounts DIRECTLY to Glock 43 MOS slide without any mod or filing.

Extra Protection - The 7075 T6 body is durable for duty carry, but it will be better to add the IRONSLIDES Shield to it to beef up the lens hood protection

Low Profile Lens Hood - Aim with both eyes open and see targets clearly 

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. 

Auto Model - A photosensitive sensor adjusts the dot brightness relative to ambient lighting conditions. 


  • 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


  • Easy to mount 
  • Holds zero
  • Affordable


  • Thin lens frame
  • Reticle may flicker when facing direct sunlight
  • Turret clicks don't have positive feedback

Glock 43X MOS Accessories

These are recommended Glock 43X MOS plate options:

CHPWS V4 Plate

OuterImpact (For non MOS model)


If you don't like the factory Glock 43 slide, you can check out some aftermarket custom Glock 43 optic ready slides