4 Best Red Dot Sights For Sig Sauer MCX

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Welcome to Best Red Dot Sights for Sig Sauer MCX Review.

As an ardent gun enthusiast, I’ve spent weeks on the range, testing various optics on a variety of weapons. One of my most trusted companions in these exercises has been the Sig Sauer MCX.

Throughout my extensive hands-on testing, one red dot sight has consistently stood above the rest when paired with the MCX: the Trijicon MRO.It’s become my top pick, impressing me time and time again with its seamless integration and performance with the MCX. 

The aim of this article is to provide comprehensive insights into the best red dot sights for the Sig Sauer MCX, based on hands-on experience and testing, thus assisting you in choosing the most suitable sight for their specific needs and preferences.

Top 4 Best Sig Sauer MCX Red Dots

1. Trijicon MRO – Best Overall Sig MCX Red Dot

Trijicon MRO-C-2200003 1x25mm Miniature Rifle Optic (MRO) Riflescope with 2.0 MOA Adjustable Red Dot Reticle (Without Mount)
  • LARGE VIEWING AREA: Allows faster target acquisition...
  • EASY-TO-SET ADJUSTERS: Adjusters provide positive-click...
  • SUPERIOR QUALITY GLASS LENSES: Multi-coated lenses...
  • AIRCRAFT-GRADE ALUMINUM HOUSING: Forged 7075 housing...

The Trijicon MRO is a compact, robust, and feature-rich optic, providing a superior sighting solution for the Sig Sauer MCX.

Compact Size & Wider FOV: The MRO is smaller than many red dots but offers a wider field of view than most micro red dots, which is great for situational awareness.

Adjustable Brightness & NV Compatibility: With 6 levels of adjustable brightness and two levels of night vision compatibility, this optic ensures optimal visibility in various lighting conditions.

Green Dot Option: The MRO offers a unique ‘lemon lime’ green dot variant that is easier to see in bright daylight conditions than the traditional red dot.

Long Battery Life: The red dot version of the MRO can last up to 5 years on a single battery, while the green dot version has an impressive 1-year runtime.

Durable and Robust: The MRO exhibits Trijicon’s well-known ruggedness and durability, able to withstand heavy use and harsh environments.

Why I love it: The Trijicon MRO’s mix of compact design, robustness, extended battery life, and the unique green dot option makes it a versatile and reliable optic. I also appreciate the wider field of view compared to other micro red dots.

My Experience

I found the MRO to be an excellent addition to my Sig Sauer MCX. The sight picture is clear, the adjustable brightness is convenient for different lighting scenarios, and the green dot was easily visible even in bright daylight. The optic stood up well to heavy use, exhibiting no discernible wear or tear.


  • Compact with a wider field of view than most micro red dots
  • Adjustable brightness and NV compatibility
  • Unique ‘lemon lime’ green dot option
  • Long battery life (5 years for red dot, 1 year for green dot)
  • Robust and durable


  • Green dot model has shorter battery life than the red dot model
  • The optic’s price may be a bit steep for some budgets
  • Point-of-impact may shift slightly after heavy impact.

2. Aimpoint Micro H-2 – Premium optic for sig mcx

Aimpoint Micro H-2 Red Dot Reflex Sight with Standard Mount - 2 MOA - 200185
  • Advanced objective lens system for better light...
  • 2 MOA dot with 12 settings for low light and daylight...
  • Standard Mount for Picatinny and Weaver Mount Included
  • Up to 5 years of continuous operation using one CR2032...
  • Front and rear flip-up lens covers included

The Aimpoint Micro H-2 is a robust, high-performance red dot sight with unrivaled durability and versatility, perfect for real-world warfighters.

Combat-Grade Durability: The Micro H-2 is built like a tank, ensuring consistent performance even when subjected to rough handling or extreme conditions.

CQB & Mid-Range Adaptability: Paired with a red dot magnifier, the Micro H-2 extends its utility from close quarters to mid-range engagements, enhancing target identification capability.

Advanced Objective Lens System: The sophisticated objective lens system of the Micro H-2 offers superior light transmission and unbeatable optical clarity.

Impressive Battery Life: With a single CR2032 battery, the Micro H-2 offers up to five years of continuous operation, eliminating frequent battery changes.

Why I Love it: The Aimpoint Micro H-2 is the epitome of durability and flexibility. Its rugged design, versatile mounting options, and advanced lens system all add up to an excellent sight that is a joy to use on any mission.

My Experience

From the moment I mounted the Aimpoint Micro H-2 on my Sig Sauer MCX, I knew I had a winning combination. The sight held its zero through several rough handling tests, truly living up to its reputation. 

The lens system provided exceptional clarity, and the extended battery life is a definite bonus. For both CQB and mid-range engagements, the Micro H-2 has performed impeccably.


  • Exceptional durability and resilience
  • Compatibility with various mounts
  • Operator-grade optic, ideal for combat scenarios
  • Enhanced light transmission and superior optical clarity
  • Extended battery life up to 5 years


  • Expensive without included mount
  • Standard mount may not fit all Picatinny and Weaver rails.

3. HOLOSUN HS510C – Budget Alternative of Trijicon

HOLOSUN HS510C Multi-Reticle Green 2 MOA Dot & 65 MOA Circle Open Reflex Sight for Long Guns - Shake-Awake Solar FailSafe Waterproof Sight (HS510C)
  • HOLOSUN RED DOT SIGHT - The HS510C sight is a versatile...
  • MULTI-RETICLE SYSTEM - This Holosun red dot sight is...
  • SHAKE AWAKE TECHNOLOGY - Extends battery life by...
  • SOLAR FAILSAFE - If your battery fails, this red dot...
  • SPECIFICATION - Reticle: Red 2 MOA Dot & 65 MOA Circle;...

The HOLOSUN HS510C is an affordable, innovative, and stylish entry-level reflex optic that offers great versatility and functionality.

Unique and Stylish Design: The HS510C sports a unique and slick outer profile that perfectly complements the aesthetics of the Sig Sauer MCX.

Three Reticle Patterns: Users have the choice of switching between three reticle patterns – a 65 MOA ring with a 2 MOA dot, a 65 MOA ring only, or a 2 MOA dot only – based on their tactical requirements.

Large Field of View: The HS510C provides a large field of view for faster target acquisition, allowing for more flexible head movement when aiming behind the optic.

Solar Failsafe Technology: Solar failsafe technology ensures the sight never turns off by extending battery life beyond the already impressive 100,000 hours.

Quick Detach Mount: The sight mounts easily on any M1913 rail with a quick detach lever, allowing for rapid on/off transitions on the MCX’s top rail, and compatibility with other guns in your collection.

Why I Love it: I love the HOLOSUN HS510C for its blend of affordability, style, and functionality. The three reticle patterns offer great flexibility while the large field of view and never-dying battery increase its usability. The quick detach mount adds to its convenience, making it a pleasure to use.

My Experience 

Mounting the HOLOSUN HS510C on my Sig Sauer MCX, I was immediately impressed by its slick design. The quick detach mount was a bonus, making it easy to transfer between guns.


  • Very affordable for the features it provides
  • The adjustable quick detach screw ensures a secure mount
  • Wide field of view for faster target acquisition
  • Includes additional lens hood protection similar to EOTECH


  • The open emitter design can let in dirt, potentially affecting the view

4. EOTECH EXPS3 – Rapid Target Acquisition

EOTECH Holographic Weapon Sight EXPS3-0 black
  • EOTECH EXPS3-0 - Holographic Weapon Sight in black with...
  • Night Vision Compatible - Works with all Gen 1-3 night...
  • Side Button Operation - Compact design and side button...
  • Mount - Quick Detach lever fits 1" Weaver and MIL-STD...
  • EOTECH HWS Prestige Warranty - Comes with a 10 year...

The EOTech EXPS3 is a high-grade holographic sight built for rapid target acquisition and remarkable performance in diverse conditions, making it an ideal pairing for the Sig Sauer MCX.

Fast Target Acquisition: The EXPS3 uses a 68 MOA ring reticle, allowing for quick and efficient target acquisition in close quarters battle (CQB) scenarios compared to standard 2 MOA dots.

Wide Situational Awareness: Designed for shooting with both eyes open, the EXPS3 offers wide situational awareness, ensuring you never miss anything happening in your peripheral view.

Night Vision Compatibility: With a night vision compatible mode, the EXPS3 can be used seamlessly with night vision goggles. Its night vision reticle isn’t visible to the naked eye or doesn’t emit glare, helping you maintain a low profile.

Raised Height Advantage: The EXPS3 sits at a 1/3rd co-witness height in addition to the MCX’s raised top receiver, providing an optimal optic-to-eye cheek weld position for the shooter.

Additional Lens Hood Protection: For added durability and protection, the EXPS3 features an additional lens hood.

Why I Love it: The EOTech EXPS3 is my top pick for its lightning-fast target acquisition and wide situational awareness. The night vision compatibility adds a layer of versatility, and the raised height provides a comfortable and effective shooting position. Its additional lens hood protection is also a nice touch.

My Experience 

The EOTech EXPS3 was a dream to use on my Sig Sauer MCX. Its large 68 MOA ring allowed for speedy target acquisition in a CQB environment. I loved the wide field of view and the added comfort provided by the raised height.


  • Provides a slick setup for the MCX
  • Offers a HUD-like aiming experience
  • Features additional lens hood protection


  • Has a shorter battery life than some red dot sights

Final Verdict

I have put these sights through the wringer on my trusted Sig Sauer MCX and my verdict is clear. After rigorous field testing, the Trijicon MRO emerges as my top choice. Each sight presents its own strengths tailored to a variety of shooting needs and preferences. 

However, with its optimal balance of performance, versatility, and robustness, the MRO stands a cut above the rest. Remember, the best sight for you ultimately depends on your unique needs, shooting style, and budget.

Also Read: 5 Best Sig Sauer MPX Red Dots


How accurate is the SIG MCX?

The SIG MCX-SPEAR LT claims improved accuracy with an average of just over 2″ five-shot groups at 100 yards and SIG’s own Elite Performance ammunition producing groups of just over 1.5″.

What is special about SIG MCX?

The SIG MCX VIRTUS Patrol, a standard configuration rifle, is special because it features a custom Sig Matchlite Duo Trigger for improved accuracy, a folding and collapsing 5-position stock, interchangeable barrels, and a special internal recoil system.

Is the MCX better than an AR-15?

The SIG Sauer’s MCX-SPEAR can fire bullets with twice the kinetic energy of an AR-15, making it potentially more powerful according to a report by The Daily Beast.

Who uses SIG MCX?

The SIG MCX-SPEAR was Sig Sauer’s submission for the United States Army Next Generation Squad Weapon (NGSW) program and was chosen as the winner, designating the weapon the XM5—since re-designated the XM7—in U.S. military service.

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I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.

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