Best Bul Armory SAS II Holosun Optics - Red & Green Dot Sights – Freedom Gorilla

If you're into high quality 1911s then chances are you’ve seen or have purchased the Bul Armory SAS II AIR, SAW, Radical, Spike, Tac Pro, or Tac.

These pistols are an excellent blend of performance, reliability, and high quality custom work.

If you are interested in learning which Holosun Red and Green Dot optics fit your SAS II model then keep reading.

We will explain which fit and the features and benefits of each.

Quick Nav

Pistols this article applies to
Holosun Optics we recommend for the Bul Armory SAS II
Holosun vs other brands
What Optics Footprint is the Bul Armory SAS II
Best RMR Footprint Holosun Optics for the Bul Armory SAS II
How to choose between red or green reticles
How to choose between open vs closed emitter
How to decide which reticle style is best for you
Conclusion

Which Bul Armory SAS II models does this apply to?

This fitment guide applies to the following Bul Armory SAS II models.

SAW
AIR
Radical 5.4”
Spike

Tac Pro 4.25”
Tac 4.25”
Tac 5"

Which Holosun Optics do we recommend for the Bul Armory SAS II?

Compatible Holosun optics for the Bul Armory SAS II:

Why do we recommend Holosun Optics vs other options?

They are a good combination of high quality and affordability.
They have the longest battery life and batteries can be changed without removing the optic.
They come in red & green reticles with different sizes and styles.
They are strong with 7075 aluminum or titanium housings and glass.
They have convenient features like Shake Awake, easy to press brightness buttons, and Side Mounted Batteries.
Some models have Solar Panels which will power the optic if the battery dies.
They have a Limited Lifetime Warranty.
They are reliable, water proof, and have a great track record

When you compare them to other options like Leupold, Trijicon, Crimson Trace, Burris, Bushnell, Aimpoint or others you will find the Holosun’s are more affordable or have more features, longer battery life, and a proven track record with millions of optics sold in the last 10+ years.

What optics footprint is the Bul Armory SAS II?

The Bul Armory SAS II AIR, SAW, Radical, Spike, Tac Pro, and Tach has an RMR footprint.

Best RMR Footprint Holosun Optics for the Bul Armory SAS II

Below are the best Holosun Red & Green Dot sights you can mount on your Bul Armory SAS II AIR, SAW, Radical, Spike, Tac Pro, or Tac. These will mount directly on your slide with no modification necessary.

1. Holosun 407C-X2 Green & Red Dot - Best Budget Option

Buy the 407C At The Best Price

The most budget friendly option is going to be the 407C. The 407C has a 2 MOA dot only. The housing is aluminum.

If you are ok with having just a 2 MOA dot all the time, then the 407C is a great option.

It has shake awake, a side removable battery, solar failsafe with auto brightness or manual brightness modes, 10 daylight and 2 nightvision settings, and is IP67 waterproof.

Read our full 407C review here.

2. Holosun 407C-X3 - Updated RMR Duty Optic

Buy the Holosun 407C-X3 At The Best Price

The Holosun 407C-X3 is the newest evolution of the popular 407C series, bringing several design improvements over the previous X2 model while maintaining the proven RMR footprint that fits most full-size pistol optic cuts and adapter plates.

The X3 version features a flatter top housing designed to improve durability and impact resistance compared to the rounded design of the earlier model. The optic also uses a blacked-out Holosun logo for a cleaner, more subdued appearance.

The optic sits approximately 1mm lower than the previous X2 version, giving a slightly lower deck height which can improve co-witness potential and overall presentation on many pistols.

The 407C-X3 uses a simple and effective 2 MOA dot reticle available in Red, Green, or Gold, providing precise aiming while still remaining fast to acquire.

Battery life has also been significantly improved. Powered by a CR1632 battery, the 407C-X3 delivers up to 100,000 hours of runtime on the dot setting at brightness level 6, roughly double the battery life of the previous X2 generation.

The optic is built from 7075-T6 aluminum and includes Holosun features like Solar Failsafe, Shake Awake, and automatic brightness adjustment, making the 407C-X3 a durable and reliable choice for range use, concealed carry, or duty pistols.

3. Holosun 507C-X2 Green & Red Dot - Best All Around Option

Buy the 507C At The Best Price

The Holosun 507C is very similar to the 407C except it has Holosun "MRS" reticle.

It's available in Red or Green reticles and the MRS (Multi Reticle System) lets you use a 32 MOA ring + 2 MOA dot, or it can be toggled to show only the 32 MOA Ring or just the 2 MOA dot by holding down the "-" button for 3 seconds.

It has shake awake, a side removable battery, solar failsafe with auto brightness or manual brightness modes, 10 daylight and 2 nightvision settings, and is IP67 waterproof.

Read our full 507C review here.

4. Holosun 507C-X3 - Updated RMR Multi-Reticle Optic

Buy the Holosun 507C-X3 At The Best Price

The Holosun 507C-X3 is the newest evolution of the popular 507C series, updating the previous generation with a reinforced housing and improved design while maintaining the proven RMR footprint used by most full-size pistol optic cuts and adapter plates.

The X3 version features a flatter top housing designed to improve durability and impact resistance compared to the earlier X2 generation. The optic also uses a blacked-out Holosun logo for a cleaner, more subdued appearance.

The optic also sits approximately 1mm lower than the previous X2 version, giving a slightly lower deck height which can help improve co-witness compatibility and overall presentation on many pistols.

The 507C-X3 features Holosun’s Multi-Reticle System (MRS), allowing shooters to switch between a 2 MOA dot, a 32 MOA circle, or the Circle-Dot combination. Reticle colors are available in Red, Green, or Gold.

Powered by a CR1632 battery, the 507C-X3 delivers up to 100,000 hours of battery life on the dot-only setting at brightness level 6, roughly double the runtime of the previous X2 generation.

The optic is constructed from 7075-T6 aluminum and includes Holosun features like Solar Failsafe, Shake Awake, and automatic brightness adjustment, making the 507C-X3 a durable and versatile option for concealed carry, duty pistols, or range use.

5. Holosun 507C ACSS Vulcan Green & Red Dot - Best Specialty Option

Buy the 507C ACSS Vulcan At The Best Price

The 507C ACSS Vulcan may pique your interest. It's just like the 507C except it has the ACSS Vulcan reticle. This reticle features a 250 MOA Ring and a 10 MOA chevron - sounds crazy right? Well it's crazy awesome! It helps new red dot shooter and experts alike, and allows for the most precision out of all optics mentioned here.

You can learn more about the ACSS reticle here but to summarize, the 250 MOA Ring helps you find the center dot quickly if you are off center and the 10 MOA chevron acts like a BDC reticle and also has a very precise point for precision work.

It's available in Red or Green reticles and if you wanted to turn the outside ring off you can by holding down the "-" button for 3 seconds.

It has shake awake, a side removable battery, solar failsafe with auto brightness or manual brightness modes, 10 daylight and 2 nightvision settings, and is IP67 waterproof.

Read our full 507C ACSS review here.

6. Holosun 407COMP - Large Competition Window 6 MOA Dot

Buy the Holosun 407COMP At The Best Price

The Holosun 407COMP delivers the same large competition-ready housing as the popular 507COMP, but with a simplified reticle designed for shooters who prefer a clean aiming point. It is also the most budget-friendly competition-style optic in Holosun’s lineup, coming in at a lower price than the 507COMP and 507PROMAX.

Built on the RMR footprint, the 407COMP fits a wide range of full-size pistol optic cuts and adapter plates while maintaining a low-profile mounting setup.

The optic features a large competition viewing window, giving a wide sight picture that makes it easier to track the dot during fast target transitions and recoil.

Instead of Holosun’s Competition Reticle System used on the 507COMP, the 407COMP uses a simple and effective 6 MOA dot. The reticle is available in Red, Green, or Gold, offering a bold aiming point that is easy to see during fast shooting.

Power comes from a side-loading CR1632 battery tray, allowing battery replacement without removing the optic or losing zero. Battery life is rated up to 50,000 hours on the dot-only setting.

The optic is built from 7075-T6 aluminum and includes Holosun features like Shake Awake, Lockout Mode, and brightness memory, making the 407COMP a strong option for competition shooters who want a large window optic without the higher price of the other competition models.

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

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.

8. Holosun 507PROMAX - Largest Competition Window Optic

Buy the Holosun 507PROMAX At The Best Price

The Holosun 507PROMAX is designed for shooters who want the largest possible viewing window on a pistol optic. With a window size of 1.18 × 0.98 inches, it offers roughly 21% more viewing area than the 507COMP, making it the largest pistol red dot window currently available.

Built on the RMR footprint, the 507PROMAX fits a wide range of full-size pistol optic cuts and adapter plates while maintaining a secure, competition-ready mounting setup.

The optic uses Holosun’s Performance Reticle System (PRS), giving shooters multiple reticle choices including a 2 MOA dot, 8 MOA circle, 20 MOA circle, 32 MOA circle, and circle-dot combinations. The reticle is available in Red, Green, or Gold, allowing shooters to choose the reticle color and style that best fits their shooting preference or match environment.

A forward-leaning integrated sunshade helps reduce glare and improves reticle contrast in bright lighting conditions, while the enlarged window makes it easier to track the dot during fast transitions and recoil.

The 507PROMAX also features a solar panel unlike the 407COMP and 507COMP, which gives it Solar Failsafe and an auto brightness mode.

Power comes from a side-loading CR1632 battery tray with up to 100,000 hours of battery life on the dot-only setting. The optic is built from durable 7075-T6 aluminum and includes Holosun features like Shake Awake, brightness memory, and Lockout Mode for reliable performance.

9. Holosun 508T Green & Red Dot - Most Durable Open Emitter

Buy the 508T At The Best Price

Next on the list is the Holosun 508T. It's very similar to the 507C except it has a stronger housing made out of titanium and a square window that's a little bigger.

The 508T's square titanium housing is made to give it extra durability, both from the shape and the material.

It's available in Red or Green reticles and they come with Holosun's Multi Reticle System, which is a 32 MOA ring + 2 MOA dot, and can be toggled to show only the 32 MOA Ring or just the 2 MOA dot by holding down the "-" button for 3 seconds.

It has shake awake, a side removable battery, solar failsafe with auto brightness or manual brightness modes, 10 daylight and 2 nightvision settings, and is IP67 waterproof.

Read our full 508T review here.

10. Holosun 509T Green & Red Dot - Most Durable Closed Emitter

Buy the 509T At The Best Price

The 509T is going to be the most heavy duty pistol optic you can buy from Holosun. It's an enclosed emitter and made with a titanium housing. The titanium is not to make it lightweight, it's to make it more durable.

The 509T comes with an RMR adapter plate

The enclosed emitter ensures that nothing can obstruct the view of the emitter and the lens, meaning water, dirt, lint or any other molecule will not get inside the optic. It will also make the optic easier to wipe off if it were to drop in mud or something like that.

The 509T is not going to be the lightest optic, but it will be the toughest.

It also has a nice big FOV and is filled with nitrogen which will help with fog-mitigation, just like a scope.

It has shake awake, a side removable battery, solar failsafe with auto brightness or manual brightness modes, 10 daylight and 2 nightvision settings, and is IP67 waterproof.

Read our full 509T review here.

11. Holosun 509 ACSS Vulcan Red - Best Specialty Closed Emitter

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)

This optic is a good option is you need an enclosed emitter and must have the ACSS Reticle.

12. Holosun EPS Red or Green 6MOA, 2MOA, MRS - Best All Around Closed Emitter

Holosun EPS Green Dot - Aluminum Housing, Enclosed Emitter, 2 MOA/6 MOA/MRS Versions, RMR Adapter Plate, Solar Failsafe™ (MRS only).

Buy the EPS At The Best Price

Last but in no way the least is the Holosun EPS. This is Holosun’s latest closed emitter optic and is made out of aluminum. It comes with an RMR adapter plate so it will mount directly on your slide.

These EPS models come in red or green and either a 2MOA, 6MOA, or MRS Reticle. The MRS Reticle has a solar failsafe and auto brightness mode, the others do not.

Read our full EPS Full Size review here.

13. Holosun AEMS-MACRO - Large Window Enclosed Competition Optic

Buy the Holosun AEMS-MACRO At The Best Price

The Holosun AEMS-MACRO combines the large window performance of competition-style optics with the durability of a fully enclosed emitter design. With a 0.9 × 0.9 inch viewing window, it provides a wide, square sight picture that makes it easier to track the dot during recoil and fast target transitions.

The enclosed emitter housing protects the LED from rain, dust, and debris, making the AEMS-MACRO a strong option for shooters who want the reliability of an enclosed optic without giving up a large viewing window.

The optic uses Holosun’s Multi-Reticle System (MRS), allowing you to select between a 2 MOA dot, a 32 MOA circle, or a circle-dot combination. The reticle is available in Red, Green, or Gold, giving shooters flexibility to choose the reticle color that works best for their environment and eyesight.

The AEMS-MACRO includes Holosun features like Solar Failsafe and a forward-facing light sensor for automatic brightness adjustment, along with Shake Awake technology for dependable performance.

Built from durable 7075 aluminum, the optic mounts using 509T footprint adapter plates.

Choosing between Red or Green 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.

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 : 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 : 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): 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 : 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.
	CRS Reticle (32 MOA Ring, 20 MOA Ring, 8 MOA Ring, 2 MOA Center Dot): The CRS reticle is 7 different reticles in one. It comes with a 32 MOA circle, 20 MOA circle, 8 MOA Circle, and 2 MOA Dot. Holding down the "-" button for 3 seconds lets you toggle through all the reticle options to decide which you like best. You can use The 2 MOA Dot only, one of the circles only, or both the dot and a circle combo together.