Hey Freedom Gorillas, today we are going to cover which Holosun Red & Green Dot sights will fit on your Kimber 2K11.

If you have a 2K11 or are thinking about purchasing one, congrats, these things are badass! The doublestack 2011 category is continuously growing, and we are happy to see Kimber step into the game, especially with the .45 cal models!

The 2K11 comes optics ready, which is great, and in this guide we are going to outline some of the best Holosun optics you can mount on it.

To learn more keep reading.

Which Holosun Optics do we recommend for the X?

RMR Footprint Optics - these are larger optics with larger windows and more overhang on the slide:

Quick Nav

Pistols this article applies to
Holosun Optics we recommend for the Kimber 2K11
Holosun vs other brands
What Optics Footprint is the Kimber 2K11
Best RMR Footprint Holosun Optics for the Kimber 2K11
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 Kimber 2K11 models does this apply to?

This guide will apply to all Kimber 2K11 models in both 9mm and 45 Caliber.

Kimber 2K11 OR
Kimber 2K11 Target OR
Kimber 2K11 Stainless Target OR

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

What optics footprint is the Kimber 2K11?

The Kimber 2K11 uses an optic plate system. They machine the slide then give you an RMR adapter plate to mount on the slide. The optic then mounts to the plate.

The Kimber 2K11 ships with an RMR plate but Kimber will be producing more adapter plates for it in the future.

Best RMR Footprint Holosun Optics for the Kimber 2K11

Here are the RMR Footprint Holosun optics that will fit the Kimber 2K11. These are larger optics that will have some overhang on the slide. If you plan on using any of these optics for EDC, Duty, or even competition use, they will make excellent choices.

As you read about each, you will see that some will perform better in certain areas than others.

1. Holosun 407C 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 507C 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.

3. 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 is 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 Vulcan review here.

4. 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 a very popular option. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

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.

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 : 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.
	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.