4 Best GLOCK 43X MOS Red Dot [+Plate Options]

swampfox sentinel red dot on glock 43x mos

Here are the 4 best Glock 43X MOS red dot sights that are compatible right out of the box.

This guide also helps you to decide if the G43X MOS is the right choice without dealing with compatibility issues later

Let's check them out

Top Glock 43X MOS Red Dot For Sale

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Holosun 507K X2 - Best Overall

Glock 43x mos holosun 507K

Highly recommended to mill slide for the BEST fit on the slide. For factory MOS model CHPWS filler plate required

Or Modify the MOS slide to properly fit the Holosun 507K

Why people love Holosun 507K – This is by far the best optic for Glock 43X MOS. It's made for slim profile handguns, and its the same width as the Glock 43X slide without sticking out on the sides.

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

Activates via motion sensor - The Holosun ShakeAwake technology instantly activates the reticle upon motion & deactivates when not in motion to save more battery juice.

Simple battery change without hassle - Access the battery from the side tray instead of the bottom to eliminate the need to remove the sight for a battery swap.

CHWPS Filler Adapter Required For Perfect Co-Witness! Buy Here


  • Side battery access to load battery
  • Very long battery life
  • Very small and compact for CCW
  • Durable front lens construction


  • MOA adjustment requires a small flat head screw driver

Trijicon RMRcc - Best Durability

Glock 43X rmrcc

Highly recommend milled slide mount instead of using a factory G43X MOS, RMRcc doesn't fit the MOS model with RMSc footprint

Why pick the NEW RMRcc - This is the same RMR quality micro red dot for Glock 43X. The RMRcc is thinner and more compact for micro sized single stack CCW pistols.

Reduced 0.2" for slimmer profile - Fits flush on the G43'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 secures the setting regardless of bumping or rubbing against clothing when concealed.

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

Upgraded electronics - Ruggedized battery contacts and electronics to ensure performance and survivability in harsh environments. The tighter battery grip prevents the battery from getting lose due to drops, bumps or repeated recoils

CHWPS Filler Adapter Required Buy Here

trijicon rmrcc vs rmr


  • As durable as the 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

Shield RMSc (Aluminum Body) - Lowest Profile

glock 43x mos shield rmsc

Why use Shield RMSc – The RMSc shares the same mounting footprint as the original RMS red dot, and it fits the Glock 43X right out of the box.

It’s slimmer so it mounts flush to both sides of the slide without lateral overhang.

The Shield RMS is used with the British regular army and Special Forces, as well as US, Australian, New Zealand Special Forces and other NATO forces. Also used by competitive sports men and women across the globe.

Perfect for single stack pistols - Fits flush on the Glock 43X's slide with its skeletonized body aluminum housing. Looks great, feels great and built tough.

Polymer glass optic for endurance - Parallax free, clear polymer optic, which can withstand up to ten times greater shock impact than products using glass optics. The RMS is designed without a red reflective filter on the lens to ensure minimal visual signature

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 - Two MOA reticle sizes to pick from, which are both great for fast target acquisition. 4 MOA dot is recommended.


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


  • A bit pricey 

find your pistol light here

Higher Lumen & Candela | Better Low Light Positive ID | Better Ergonomics

Holosun 507C (Special Mount Needed)

Holosun 507c on glock pistol USPSA

Why get this one over the Trijicon RMR - If you are still not sold on the newest Holosun 507K or RMRcc. The Holosun 507C can work with your Glock 43X. It's the go-to option now for many full size handguns and rifles. You just need a special adapter plate to make it work.

Shares the same RMR mounting footprint - It uses the same mounting footprint as the RMR. Try Forward Control Design mounting plate

Multi-reticle system - Each reticle pattern gives the shooter different aiming style for different shooting applications, and the shooter can switch among:

  • 2 MOA Center dot
  • 32 MOA circle
  • 32 MOA circle + 2 MOA Dot

*Change by pressing the minus button for 3 seconds.

32 MOA circle helps significantly for picking up the sight faster because it's big and easier to see.

2 MOA center dot is great for general shooting including long distance shooting without the 32 MOA circle obstructing the target sight picture.

For the cost of this optic, you can get almost 2 Trijicon RMR’s. The battery life is great, and you will not disappoint.

acss vulcan reticle pov

Please try ACSS reticle to help recenter the reticle if lost in the window (Buy Holosun 507C ACSS)


  • Skeletonized body to reduce weight
  • Same multi reticle system as the 507C
  • Very durable the same way as Trijicon RMR


  • Why use this when 507K is available?
  • Wider than the G43 slide width
  • Additional optic plate required

$60 off $600 (use code: MC4) – Complete the build you have been saving up for

Glock 43X MOS Red Dot Compatibility [Plate Options]

RMSc red dot will fit the factory Glock 43X MOS footprint. It's also has the same Glock 48 MOS red dot compatibility.

These are recommended plate options:


OuterImpact (For non MOS model)


Glock 43X Red Dot Slide

Agency Arms Hybrid Special Glock 43/43X Stripped Precut Pistol Slide, Black, G43-H-SL

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