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Top 7 Glock MOS Full Size & Compact Holosun Optics (Not 43X or 48)

best glock mos holosun optics

If you have a Glock MOS Full Size or Compact model (not the slim 43X or 48 MOS) then this article is going to tell you exactly which Holosun Optics fit and which we recommend.

The Glock MOS mounting platform comes with a proprietary cut slide and 4 adapter plates. For most of these you will use adapter plate #2.

The Red Dot & Green Dot Optics in this article will fit these Glock MOS models:

Will Fit ✔️ 

  • G17 Gen4 MOS
  • G17 Gen5 MOS
  • G19 Gen4 MOS
  • G19 Gen5 MOS
  • G20 Gen5 MOS
  • G21 Gen5 MOS
  • G22 Gen5 MOS
  • G23 Gen5 MOS

Will Fit ✔️

  • G34 Gen4 MOS
  • G34 Gen5 MOS
  • G35 Gen4 MOS
  • G40 Gen4 MOS
  • G41 Gen4 MOS
  • G45 MOS
  • G47 MOS

 Will Not Fit ❌

  • G43X MOS
  • G48 MOS

Why do we recommend the Holosun Optics vs other options?

  • They are affordable but not cheap. 
  • They are built sturdily with strong aluminum housings and glass. 
  • They have convenient features like Shake Awake and Side Mounted Batteries.
  • They have a Limited Lifetime Warranty.
  • They are reliable.
  • They are waterproof.

1. Holosun C Series - 407C & 507C

Holosun 407C Red Dot - Budget-Friendly, 2 MOA Dot, Shake Awake, IP67 Waterproof.

You can get these in Red or Green reticles. The 407C has a 2MOA Dot the 507C has the M.R.S reticle, 32 MOA Circle and 2 MOA Dot

Quick Highlights

  • Aluminum Housing
  • Shake Awake
  • Solar Backup
  • RMR Footprint (Glock MOS plate #2)
  • Removable Battery
  • Auto Brightness Setting with Manual Override

Read our full 407C review here.

Read our full 507C review here.

View All C Series At The Best Price


2. Holosun SCS MOS

Holosun SCS MOS - Titanium Housed Solar Powered Optic.

The SCS MOS is made specifically for the Glock MOS platform. When installed it lets you keep the use of your iron sights. It also has side serrations for a nice factory look.

Quick Highlights

  • Titanium Housing
  • Solar Powered with Internal Battery
  • MOS Footprint (No MOS adapter plate needed)
  • Non-Removable Battery
  • Auto Brightness Setting with Manual Override

Get The SCS-MOS At The Best Price

3. Holosun Titanium Series - 508T

Holosun 508T Red Dot - 32 MOA Ring + 2 MOA Dot, Titanium Housing, Multi Reticle System, Shake Awake.

These are exactly like the C series except they feature a slightly different shape, slightly larger window, and are made out of titanium to save weight. They come in Red or Green reticles and both feature the MRS 32 MOA Circle with 2 MOA Dot.

Quick Highlights

  • Titanium Housing
  • Shake Awake
  • Solar Backup
  • RMR Footprint (Glock MOS plate #2)
  • Removable Battery
  • Auto Brightness Setting with Manual Override

Read our full 508T review here.

View All T Series At The Best Price

4. Holosun 509T - Enclosed Emitter

Holosun 509T Green Dot - 32 MOA Ring + 2 MOA Dot, Titanium Housing, Enclosed Emitter, Multi Reticle System.

This one is in a league of it's own. It's an enclosed emitter which means it has two panes of glass and fully protects the reticle beam from being covered by dirt, water, or debris. It comes in red or green and both versions have the MRS Reticle.

Quick Highlights

  • Titanium Housing
  • Enclosed Emitter
  • Shake Awake
  • Solar Backup
  • RMR Footprint (Glock MOS plate #2)
  • MOS direct adapter plate available here
  • Removable Battery
  • Auto Brightness Setting with Manual Override

Read our full 509T review here.

View All 509T Series At The Best Price

5. Holosun 507C ACSS Vulcan Red or Green

Holosun 507C ACSS Vulcan Red Dot - ACSS Vulcan Reticle, Shake Awake, IP67 Waterproof.


Buy the 507C ACSS Vulcan At The Best Price

The 507C ACSS Vulcan is just like the 507C MRS except it has the Primary Arms ACSS Vulcan Reticle. This is a 10 MOA Chevron with a 250 MOA Outer ring.

When you look through the optic all you will see is the chevron. The chevron has a precise aiming point and acts as a BDC reticle. The 250 MOA outer ring is only visible when you do not have your dot centered. The ring is meant to act as a guide helping you find the dot quickly upon drawing the weapon. It’s a pretty cool system!

  • Aluminum Housing
  • Red or Green Dot ACSS Vulcan Reticle (learn more here)
  • 10 MOA Chevron + 250 MOA Outer Ring 
  • RMR Footprint (Glock MOS plate #2)
  • Up to 20,000 Hours Battery Life 
  • 12 Brightness Setting: 10 DL & 2 NV Compatible
  • Side Battery Compartment
  • Auto Brightness Mode or Manual Mode
  • Solar Failsafe™
  • Shake Awake™
  • IP67 Waterproof

Read our full 507C ACSS review here.

6. Holosun 509 ACSS Vulcan Red

Holosun 509 ACSS Vulcan - 10 MOA Chevron + 250 MOA Outer Ring, Aluminum Housing, Enclosed Emitter, Shake Awake.


Buy the 509 ACSS Vulcan At The Best Price

Similar to the 509T is the 509 ACSS Vulcan. It is an enclosed emitter optic, but it has two major differences. It’s made out of aluminum and it has the ACSS Reticle (10MOA Chevron + 250 MOA Outer Ring)

It's worth mentioning that the 509T adapter plate we mentioned above will not work with this 509 ACSS Vuclan.

  • Enclosed Emitter
  • Aluminum Housing
  • Red ACSS Vulcan Reticle (learn more here)
  • 10 MOA Chevron + 250 MOA Outer Ring 
  • Up to 50,000 Hours Battery Life (Setting 6 Dot Only)
  • 12 Brightness Setting: 10 DL & 2 NV Compatible
  • Side Battery Compartment
  • Auto Brightness Mode or Manual Mode
  • Solar Failsafe™
  • Shake Awake™
  • IP67 Waterproof

7. Holosun 507 Comp Green & Red Dot - Largest Window Competition Reticle

Holosun 508T

Buy the 507 Comp At The Best Price

Next on the list is the Holosun 507 Comp. This is one of the newest and most sought after optics from Holosun. Comp stands for "Competition" because this optic features a VERY large window, meant for competition shooting. It's the largest window in the industry.

The 507 Comp has some key differences vs the other optics listed here. First it has the C.R.S. which is the Complete Reticle System. This gives it many reticle configurations like a 2 MOA Dot only or a 2 MOA dot + 8 or 20 or 32 MOA Circle or just a 8 or 20 or 32 MOA Circle.

The 507 Comp also does not have a solar panel on it which means there is also no auto brightness setting.

It has a 7075 aluminum housing, shake awake, a side removable battery, manual brightness modes, 10 daylight and 2 nightvision settings, and is IP67 waterproof.

This is a large optic.

Read our full 507 Comp review here.

Choosing between Red or Green Reticles

Comparison of Red vs. Green Dot Reticles

You may be wondering if you should get a red or green dot reticle. We get this question a lot so I am going to list a few bullet points for you to consider.

  • Green reticles are less straining for the eye to see.
  • Green reticles can help with astigmatism. If you have astigmatism you will see a blurry dot, we have been told by a few customers that Green dots help with their astigmatism, making the dot look more crisp than the red version.
  • Green will not washout on backdrops like green grass, foliage, or green colors.
  • In theory Green dots can have a longer battery life because Green is brighter, so for example a green dot on brightness setting 6 may be the same brightness as a red dot on setting 7 - which would save battery life.

If you want to learn more check out our full article about Red vs Green Dot Pros & Cons here.

Choosing between Open vs Closed Emitters

The simplest way we can break down open vs closed emitters is to look at how you plan on carrying the pistol. If you plan on being outdoors in the elements with rain, snow, sleet, then a closed emitter will be beneficial.

If you plan on carrying OWB most of the time and plan on being outside then closed emitter would be beneficial.

If you plan on carrying IWB or don't plan on being outside using your red dot in the pouring rain or heavy snow then an open reflex is fine.

Open reflexes will still work in the rain or snow but the closed emitter will give you extra peace of mind.

An open reflex can collect dust and debris on the inside of the reticle over time, so you'll want to clean it out from time to time. An enclosed emitter is easier to clean in this aspect.

To learn more about Open vs Closed emitters you can check out our Open vs Closed Emitter Guide here.

How to decide which reticle style is best for you

In this guide we covered a few different reticle options. If you need some help deciding which is best for you here are some of our thoughts on each.

  • 2 MOA only (407C, EPS 2 MOA): This dot is quite small which makes it precise. The downside is that it can be hard to “pick up” upon drawing the weapon. If you are experienced shooting red dot sights on pistols then this may not be an issue for you. If you are new, we recommend you practice “finding the dot” at home to become proficient. If you can train your muscle memory to find the dot then 2 MOA is a great choice.
  • 6 MOA only (EPS 6 MOA): This dot is decently larger than the 2 MOA dot. We classify this as more user friendly than the 2 MOA dot as it’s a bit easier to pick up upon drawing. The 6 MOA dot will not be as precise as the 2 MOA dot at long distances (50+ yards) but it is still plenty accurate at all distance ranges. The 6 MOA dot is a nice size and it gives you a less cluttered reticle. Some people prefer it over the MRS.
  • MRS Reticle (32 MOA Ring + 2 MOA Dot) (507C, 508T, 509T, EPS MRS, SCS MOS): This reticle is a good combination of both large and small. You have the 2 MOA dot to be precise with, and the 32 MOA Ring to help “find the dot”. The 32 MOA Circle is quite hard to miss. The nice thing about this reticle is the flexibility. You can use the 32 MOA Ring only or the 2 MOA dot only or both together. This way you can find what you prefer and stick to it.
  • ACSS Vulcan with 10 MOA Chevron and 250 MOA Outer Ring (507C ACSS Vulcan, 509 ACSS Vulcan): This reticle is going to be the most precise out of all the other options because of it’s Chevron. The tip of the chevron is the most precise aiming point in any red dot reticle. The 250 MOA outer ring is not visible when the chevron is centered, it’s only visible when you need to adjust your aim. This way “finding the dot” becomes quicker. The chevron also gives you range finding capabilities which none of the other optics do. The only shorter battery life compared to other options.


The Glock MOS is a great platform. Any of the optics mentioned above would be a great addition to yours.

If you have any further questions please reach out to us on chat.

Thanks for reading!

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