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Holosun 508T X2 Review - The Most Affordable Duty Pistol Optic

Holosun 508T X2 Review - The Most Affordable Duty Pistol Optic

Hey Freedom Gorillas, today we are going to talk about the Holsoun 508T X2. This is Holosuns most durable open reflex RMR footprint optic. It’s made out of grade 5 titanium and has a square shape to make it extra durable and drop proof. 

We understand that not having these optics in front of it can make it difficult to decide which to get. With this review article we aim to give you more information to help you make the right decision for your use case.

The red dot version is $369.99 and green dot version is $399.99.

Holosun 508T X2 Side by Side Red & Green Dot Sights

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The Holosun 508T X2 comes in red or green reticles. It is an open reflex sight, has an RMR footprint, and is made out of Grade 5 Titanium. It has all of Holosuns best features like the MRS reticle, solar failsafe, long battery life, side removable battery, shake awake, auto and manual brightness, and IP67 waterproof ratings.

What makes the 508T X2 unique is it’s titanium housing and square shape which are both designed and proven to give it ultra durability when it comes to being abused and withstanding drops.

Holosun 508T X2 box side by side

Buy the 508T X2 Red Dot at The Best Price Buy the 508T X2 Green Dot at The Best Price

Other quick stats and dimensions on the Holosun 508T X2 are as follows:

  • Open Reflex Sight (Read more about open vs closed emitters optics here)
  • RMR Footprint
  • MRS Reticle: 32 MOA outer ring + 2 MOA center dot, configurable
  • 10Khrs of battery life with MRS reticle, 50K hrs of battery life with 2 MOA dot only on setting 6
  • 12 Brightness Setting: 10 Daylight & 2 Nightvision Compatible
  • Manual & Auto Brightness Modes
  • Convenient Side Battery Compartment
  • Grade 5 Titanium Housing
  • Solar Failsafe
  • Parallax-free & Unlimited Eye Relief
  • IP67 Waterproof
  • Shake Awake™
  • Multilayer Reflective Glass
  • 1 MOA Adjustment per Click
  • CR1632 Battery
  • Window Size: .63" High, .91" Wide
  • Optic Size: 1.77"L, 1.08"H, 1.21"W
  • Weight: 2 oz

Holosun 508T X2 Reticles

The Holosun 508T X2 comes in both red and green reticles and has Holosuns Multi Reticle System (MRS). The MRS Reticle is three reticles in one. You get a 32 MOA outer ring, a 2 MOA Center dot, and can use just the 32 MOA ring only.

To toggle the reticle, you hold down the "-" button for three seconds and the reticle will change.

Holosun Pistol MRS Reticle - how to toggle

The MRS reticle is nice if you want flexibility. The larger outer ring helps you "find the dot" and the 2 MOA center dot is small and precise.

The green version is slightly more expensive.

Holosun 508T X2 MRS Reticle - side by side - red dot and green dot

Holosun 508T X2 Pricing & Models

The Holosun 508T X2 comes in red or green reticles and has the MRS Reticle.

You can learn more about red vs green dots here.


Holosun 508T X2 Red Dot Sight


Buy the 508T X2 Red Dot At The Best Price


Holosun 508T X2 Green Dot Sight


Buy the 508T X2 Green Dot At The Best Price

Holosun 508T X2 Dimensions & Size

Holosun 508T X2 Dimensions, Size, Weight
  • Deck height: 8.59MM
  • Width: 1.21"
  • Length: 1.77"
  • Height: 1.08"
  • Window Size: .91" Wide, .63" Tall
  • Weight: 2 oz

Holosun 508T X2 Footprint

The Holosun 508T X2 is an RMR footprint optic. This means it will fit on any RMR footprint slide or adapter plate.

Holosun 508T X2 RMR Footprint and RMR slide example.

Holosun 508T X2 Intended Use

The Holosun 508T X2 is an RMR footprint optic and a regular sized pistol red dot. This means it is intended for use on any pistol with an RMR footprint or RMR adapter plate. Most of the time this means the pistol will be a full size or compact such as a Glock 19 MOS or a S&W M&P 2.0. Make sure you know what footprint your gun is. The 508T X2 is not intended for and usually will not fit any micro compact pistol like a Glock 43X MOS or Sig P365. For the smaller pistols you want to look at the 507K X2 this is because the smaller micro compact pistols usually come with a different footprint like the RMSc or K series footprint.

The 508T X2 can also be used as a rifle optic, PCC optic, or backup scope optic if you get an "RMR" picatinny or offset adapter found here.

In the Holosun 508T X2 Box

When you open the Holosun 508T X2 this is what you will find in the box:

  • 1x CR1632 Battery (installed inside the optic)
  • Holosun Warranty Card
  • Holosun Battery, Screws, & Adjustment Tool
  • Holosun Manual
  • 4x 6-32 Screws (short), 4x 6-32 Screws (long)
  • 508T X2 Optic
  • Lens Cloth

Holosun 508T X2 Screws & Batteries

Here is an up close photo of the Holosun 508T X2 Screws, Battery, and Tool that come in the box. The battery will be pre-installed in the optic.

Holosun 508T X2 Screws, Battery, and Tool

Holosun 508T X2 Fitment Info & Adapter Plates

Below is information on mounting the Holosun 508T X2 Reflex Sight on different pistols. Some pistols require adapter plates to make it fit. The table below is for Optics Ready pistols only. If you do not have an optics ready pistol and still want to mount a 508T X2 to your platform, you can get a dovetail mount which replaces your rear dovetail sights. Find all our dovetail mounts here.

*Note: Clicking on the pistol name below will take your to our fitment guide which explains more about each platform.

Anderson Manufacturing

Arsenal Democracy

Bul Armory



Heckler & Koch


Palmetto State Armory

Shadow Systems

Smith & Wesson

Staccato 2011



Wilson Combat







Nighthawk Custom

Sig Sauer

Springfield Armory




Don't see your model listed? Check out our Fitment Guides Here.

Holosun 508T X2 Review & Highlights

The Holosun 508T X2 is one of the strongest, if not the strongest, pistol optic on the market. It is one of the few titanium housing optics on the market and that is to make it stronger - not lighter.

The 508T X2 is built for hard duty use. It can withstand drops, dings, and bangs better than any other Holosun RMR footprint optic.

Holosun 508T X2 mounted and co-witness - glock 19 p80 rmr cut slide.

It’s a higher price than the 507C X2, but you are paying for that titanium housing. It has all the best Holosun optic features like the MRS reticle, shake awake, solar failsafe, auto + manual brightness, side removable battery, long battery life, and IP67 waterproof rating.

The 508T X2’s titanium housing and square shape make it extra durable. The other cool feature of the 508T X2 is that the “Holosun” logo on the side of the housing is completely blacked out, so the optic is 100% black housing with no large white lettering on it.

The 508T X2 could be compared to the new Trijicon RMR HD which has a similar reticle. In testing the old RMR made out of 7075 T6 Aluminum was just as strong as the Holosun 508T X2 due to it’s patented housing design. The new RMR HD shares the same patented housing design. The Trijicon RMR HD is more expensive than the 508T X2.

For the price and what you get, the Holosun 508T X2 is tough to beat.

Holosun 508T X2 Red Dot Sight


Buy the 508T X2 Red Dot At The Best Price

Holosun 508T X2 Green Dot Sight


Buy the 508T X2 Green Dot At The Best Price

Holosun 508T X2 Downsides

There aren’t too many downsides of the Holosun 508T X2. Most are “minor”. Perhaps the largest downside would be the price, however if you are looking for something super durable it is still a great value.

The other “downside” could be weight. The titanium housing gives it about .5 oz more weight than the aluminum Holosun 507C X2.

Holosun 508T X2 Warranty

Holosun has a limited lifetime warranty. Basically everything is covered for the lifetime of the optic except for the electronics, that is covered for 10 years.

We’ve dealt with Holosuns warranty department and they are easy to deal with.

Also when you purchase from Freedom Gorilla, if you have an issue within 30 days we will replace the optic for you free of charge.


The Holosun 508T X2 is an amazing optic if you are looking for something with an RMR footprint and built like a tank. This is great for police officers, military contractors, or anyone looking to outfit their pistol with an ultra durable pistol optic.

It comes with all Holosun’s great features, and for what you get, is still a great value.

If you have any further questions please reach out.

Thanks for reading!

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