6 Best Glock 42 Red Dot Sights (2024 Updated)

When it comes to concealed carry, the Glock 42 stands out as a popular choice for its compact size and reliability. However, to maximize its potential, adding a red dot sight can significantly improve your accuracy and speed.

In this guide, we'll explore the best red dot sights specifically designed for the Glock 42, considering factors such as size, weight, durability, and performance.

MY CHOICES:

• Crimson Trace CTS-1550
• Trijicon RMRcc
• HOLOSUN 507K
• Sig Sauer RomeoZero
• Swampfox Sentinel
• Aimpoint ACRO P-2

Top 6 Best Red Dot Sight for Glock 42 of 2024

1. Crimson Trace CTS-1550

Let's face it, the Glock 42 is a fantastic little .380 ACP for concealed carry. But those iron sights? Not exactly ideal for quick acquisition in a stressful situation.

Enter the Crimson Trace CTS-1550 red dot sight. This mini marvel might be compact, but it packs a punch of performance benefits.

Here's why I love it:

• Tiny Terror, Big Dot: The CTS-1550 is ridiculously low-profile, fitting perfectly on the Glock 42's frame without adding bulk. The 3 MOA red dot is a great size for a subcompact pistol, finding the perfect balance between a clear aiming point and a wide field of view.
• Fast on the Draw: Since you're focusing on the dot instead of aligning tiny sights, target acquisition is lightning fast. This translates to precious milliseconds saved in a self-defense scenario.
• Co-Witnessing FTW: Absolute co-witnessing with the iron sights is a built-in bonus. If the red dot ever craps out (batteries!), you can seamlessly switch to the irons without missing a beat.

Now, no product is perfect, and the CTS-1550 is no exception:

• Battery Drain: Like most red dots, battery life isn't amazing. Invest in some high-quality backups and make it a habit to check before heading out.
• Price Point: It's not the cheapest red dot on the market, but for the performance boost on a concealed carry gun, I think it's worth the investment.

Real World Results:

I've put hundreds of rounds downrange with the CTS-1550 on my Glock 42, and the difference is night and day. My accuracy has noticeably improved, especially during rapid fire drills. It's given me a newfound confidence in my ability to handle a defensive situation with this little gun.

One thing I love about the CTS-1550 is that other shooters seem to feel the same. Forums are full of praise for its size, ease of use, and overall performance boost. Some folks mentioned occasional issues with sight clarity in bright sunlight, but for me, it hasn't been a deal-breaker.

If you're looking to take your Glock 42 to the next level, the Crimson Trace CTS-1550 red dot sight is a fantastic option. It's small, powerful, and gives you a significant edge in terms of speed and accuracy. Just remember to keep some spare batteries handy, and you'll be ready to rock!

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2. Trijicon RMRcc

As a proud owner of a Glock 42, I was on the lookout for a red dot sight that could complement the compactness of my firearm without sacrificing performance. Enter the Trijicon RMRcc, the slimmer cousin of the renowned Ruggedized Miniature Reflex (RMR).

I was drawn to the RMRcc for its promise of durability and precision in a smaller package, tailored for concealable pistols. Here, I’ll delve into the nitty-gritty of the RMRcc’s features, its pros and cons, and the experiences I’ve had with it, along with insights from other users.

Best Features

• Slim Design: The RMRcc is specifically designed for slimline pistols, and it fits the Glock 42 like a glove, maintaining the sleek profile of the handgun.
• Durability: Crafted from 7075-T6 aluminum and designed to be waterproof to 20 meters, the RMRcc is as tough as they come.
• Clear Lens: The glass quality is exceptional, providing a clear sight picture with minimal distortion.
• Battery Life: The long battery life is a boon, especially considering the difficulty of accessing the battery compartment.
• Adjustable LED: The sight offers multiple brightness settings, which can be manually adjusted to suit various lighting conditions.

Advantages

• Ease of Carry: The RMRcc doesn’t add any noticeable weight or bulk to my Glock 42, keeping the pistol comfortable for everyday carry.
• Reputation for Reliability: Trijicon’s reputation for building reliable optics holds true with the RMRcc. I’ve found it holds zero admirably, even after extended use.
• Snag-Free Design: The sight’s smooth edges ensure that it doesn’t catch on clothing during the draw, which is a critical aspect for a defensive carry pistol.
• Improved Accuracy: The RMRcc has enhanced my shooting accuracy, particularly at distances where the Glock 42’s iron sights were less effective.

Disadvantages

• Price: The RMRcc is an investment, with a price point that might deter some budget-conscious shooters.
• Battery Compartment: To change the battery, the sight must be removed, meaning you’ll have to re-zero the sight afterward.
• No Auto-Brightness: Unlike some of its competitors, the RMRcc lacks an auto-brightness feature, which requires manual adjustments when transitioning between different lighting environments.

Personal Experience

Mounting the Trijicon RMRcc on my Glock 42 transformed my shooting experience. The red dot is crisp, and acquiring targets has never been faster. While I was initially hesitant about the price, the day-to-day reliability and ruggedness have justified the cost for me.

The installation was straightforward, though re-zeroing after a battery change was a mild inconvenience. Overall, the RMRcc has been a game-changer for my concealed carry setup.

The Trijicon RMRcc has been a valuable addition to my Glock 42, enhancing both the functionality and the shooting experience.

Despite a couple of downsides, particularly the manual brightness setting and the battery change process, the advantages, in my opinion, far outweigh the drawbacks.

My experience seems to be in line with the broader community’s view, positioning the RMRcc as a top-tier optic for those willing to invest in their concealed carry rig.

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3. Holosun HS507K-X2

As an enthusiast of compact firearms, I’ve always been on the lookout for a red dot sight that complements my Glock 42 without overwhelming it.

That’s when I discovered the Holosun HS507K-X2, a micro red dot sight designed for subcompact pistols. I was intrigued by Holosun’s commitment to innovation and affordability, and the HS507K-X2 seemed like a perfect match for my Glock 42.

Having spent considerable time at the range with this optic, I’m ready to share my experiences with its features, advantages, and disadvantages, alongside feedback from the gun community.

Best Features

• Compact Size: The HS507K-X2 is engineered for smaller pistols, and on my Glock 42, it maintains the firearm’s concealability.
• Solar Failsafe: I appreciate the solar panel that acts as a backup power source, providing an extra layer of reliability.
• Multiple Reticle System: The ability to switch between a dot, a ring, or a dot-and-ring reticle has proven versatile for various shooting scenarios.
• Shake Awake Technology: This feature is a standout for conserving battery life, activating the sight upon movement and deactivating it when at rest.
• Bright, Crisp Reticle: The reticle is bright and clear, facilitating quick target acquisition and improving my shooting precision.

Advantages

• Build Quality: Despite its small size, the HS507K-X2 feels robust and well-constructed, providing confidence in its durability.
• Long Battery Life: The sight boasts an impressive battery life, which is a significant advantage for a carry optic that needs to be ready at all times.
• Easy Installation: I found the mounting process to be straightforward, and the sight fit snugly onto my Glock 42 without any complications.
• User-Friendly Interface: Adjusting the reticle brightness and switching between modes is intuitive, which I value in a high-stress situation.

Disadvantages

• No Auto-Brightness: Unlike some other models, the HS507K-X2 requires manual brightness adjustments, which can be a minor inconvenience in rapidly changing light conditions.
• Sight Footprint: While it’s compact, the sight’s footprint may not fit all default pistol cuts without an adapter, which could be a downside for some users.
• Battery Compartment: Similar to other micro red dots, changing the battery necessitates the removal of the sight, potentially affecting zero.

Personal Experience

The Holosun HS507K-X2 has proven to be an excellent companion to my Glock 42. The sight’s low profile keeps my handgun suitable for everyday carry, and I’ve noticed a marked improvement in my target engagement speed.

The multiple reticle options have allowed me to tailor my shooting experience, and despite the lack of an auto-brightness feature, I’ve managed to adjust quickly to different lighting with the manual controls.

The battery longevity has been a relief, sparing me from frequent changes and maintaining a constant state of readiness.

Summing it up, the Holosun HS507K-X2 has been a solid performer on my Glock 42, offering a range of features that have improved my shooting without compromising the pistol’s concealability.

While there are some minor gripes regarding brightness adjustment and the battery compartment, these haven’t detracted significantly from my overall positive experience.

This sentiment is mirrored in the wider gun community, solidifying the HS507K-X2 as a worthy option for subcompact pistol owners seeking a reliable red dot sight.

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4. Sig Sauer ROMEOZero

When it comes to outfitting my Glock 42 with a reliable red dot sight, the Sig Sauer ROMEOZero caught my attention. Known for its innovative firearm accessories, Sig Sauer has introduced the ROMEOZero as a lightweight and compact option for shooters looking to enhance their aiming capabilities without compromising on the ease and comfort of carry.

Best Features of the Sig Sauer ROMEOZero

• Polymer Housing: The ROMEOZero features a reinforced polymer housing that offers durability while being exceptionally light.
• SpectraCoat?: The lens comes with Sig Sauer’s SpectraCoat? anti-reflection coatings for superior light transmission and no-distortion clarity.
• Motion-Activated Illumination (MOTAC?): It powers up when it senses motion and powers down when idle, saving battery life efficiently.
• Bright Red Dot: The 3 MOA red dot is crisp and provides three brightness settings for optimal targeting.
• User-Friendly Interface: Simple controls and easy installation make the sight accessible even for those less familiar with red dot systems.

Advantages

• Enhanced Precision: The sharp red dot allows for swift and accurate shot placement, improving my shooting performance considerably.
• Convenience: The ROMEOZero is unobtrusive, making it perfect for everyday carry without altering the handling of the Glock 42.
• Battery Life: The MOTAC? technology extends battery life, which is a huge plus for a carry optic.
• Affordability: It comes at a more budget-friendly price point compared to some of its competitors without sacrificing quality.

Disadvantages

• Polymer Lens: While the polymer keeps the sight light, it may not be as scratch-resistant as glass lenses found on pricier models.
• Limited Manual Adjustability: With only three brightness settings, there may be situations where a more fine-tuned adjustment is preferable.

Personal Experience

Integrating the ROMEOZero with my Glock 42 was a straightforward affair. The sight didn’t disrupt the balance of the pistol, and I found the additional weight to be negligible, a crucial factor for a firearm that’s meant to be carried all day.

On the range, the red dot was a delight, offering quick sight acquisition and a noticeable improvement in my accuracy over the standard iron sights.

However, I did find myself wishing for a few more brightness options during twilight hours. The polymer lens, while maintaining the sight’s light profile, also had me more concerned about potential scratches than I would have been with a glass lens.

Online Customer Comments

• “Adding the ROMEOZero to my Glock 42 was the best decision I’ve made. The dot is easy to pick up, and my accuracy has improved. Plus, it didn’t break the bank.”
• “The MOTAC? feature is genius! The sight is always ready when I draw, and I don’t worry about the battery dying on me. It’s a great fit for my G42.”
• “I love how the ROMEOZero doesn’t add any bulk to my Glock, but I do wish it had a glass lens. Still, for the price, I can’t really complain—it does its job well.”
• “I’ve been using the ROMEOZero on my carry piece for a while now. It’s survived daily wear and tear with no hiccups. If you want a solid red dot without spending a fortune, this is it.”

The Sig Sauer ROMEOZero is a compelling option for Glock 42 owners who want to step up their aiming game without compromising on the firearm’s concealability or handling.

While it may not boast the premium features of higher-end models, its combination of functionality, ease of use, and affordability makes it a valuable upgrade for everyday carry and range shooting alike.

Despite a few shortcomings, such as the polymer lens and limited brightness settings, the overall user experience remains positive, aligning with the practical needs of most shooters.

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5. Swampfox Sentinel

When it came to equipping my Glock 42 with a red dot sight, I wanted something that wouldn’t compromise the pistol’s compact nature or my ability to conceal it effectively.

The Swampfox Sentinel caught my attention as a micro red dot that seemed to tick all the right boxes for a carry gun like the Glock 42.

I’ve spent a fair amount of time testing this optic in various conditions, and I’m ready to share my personal breakdown of the Sentinel’s features, its strengths and weaknesses, as well as a summary of what other users are saying.

Best Features

• Ultra-Compact Design: The Sentinel’s slim profile fits perfectly on the Glock 42, maintaining the handgun’s compact form factor.
• Auto-Brightness Sensor: The built-in sensor automatically adjusts the dot’s brightness to the ambient light, which is a hands-off feature I find quite convenient.
• Manual Brightness Adjustment: For situations where you might want to override the automatic setting, the option for manual adjustment is there, adding versatility.
• Battery Efficiency: The Sentinel offers a Shake 'N Wake feature that puts the sight to sleep during inactivity and wakes it up upon movement, aiding in battery conservation.
• Tough Construction: Designed with a 7075 aluminum housing and scratch-resistant glass, the Swampfox Sentinel is built to withstand the rigors of daily carry.

Advantages

• Ease of Use: The automatic brightness and the Shake 'N Wake feature mean I can focus on my target without manual adjustments, making the Sentinel very user-friendly.
• Clear Sight Picture: The optics are crisp and clear, providing a great sight picture for quick and accurate shooting.
• Compatibility: The Sentinel mounts easily onto the Glock 42, and it’s been engineered to co-witness with standard iron sights, which is a plus.
• Weight: It’s light enough that it doesn’t alter the handling or balance of my Glock 42, which is essential for a carry weapon.

Disadvantages

• Battery Replacement: Like many micro red dots, the battery is located underneath the sight, so replacing it means removing the sight and potentially re-zeroing.
• Auto-Brightness Quirks: Sometimes the auto-brightness sensor can be too reactive to sudden light changes, which might not always align with my preference.
• Limited Manual Adjustment Range: While manual brightness is an option, the range of adjustment is somewhat limited compared to other sights on the market.

Personal Experience

My time with the Swampfox Sentinel on my Glock 42 has been largely positive. The automatic brightness feature has been a highlight, especially when moving between indoor and outdoor environments quickly.

The size and weight are perfect for my concealed carry needs, and the installation process was straightforward.

However, I did find that I had to rely on the manual brightness adjustments in certain lighting situations where the auto feature didn’t quite match up to my needs.

As for the battery, I haven’t had to replace it yet, but I’m not looking forward to re-zeroing the sight when that time comes.

The Swampfox Sentinel is a solid choice for the Glock 42, particularly for those who value a compact, user-friendly red dot sight.

While it has a few drawbacks, such as the battery replacement process and the quirks of auto-brightness, these are relatively minor when weighed against the advantages it brings to my shooting experience.

These sentiments are echoed within the online community, confirming that the Sentinel is a competitive option in the micro red dot market.

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6. Aimpoint ACRO P-2

I recently decided to elevate my Glock 42’s capabilities with the highly touted Aimpoint ACRO P-2.

Aimpoint has long been synonymous with rugged, user-friendly sights, and the ACRO P-2 is their latest offering in the closed-emitter red dot sight category.

Touted for its resilience and battery life, it seemed like a robust choice for my subcompact pistol.

Best Features of the Aimpoint ACRO P-2

• Closed-Emitter Design: Unlike open red dot systems, the ACRO P-2’s closed design protects the emitter from dust, dirt, and other environmental factors.
• Extended Battery Life: With an impressive 50,000 hours (over 5 years) of constant operation on a single battery, it sets a new standard for red dot sights.
• Night Vision Compatibility: The ACRO P-2 offers settings that are compatible with night vision devices, demonstrating its versatility.
• Optimal Size and Weight: Despite its rugged build, it maintains a low profile and doesn’t add excessive weight to the Glock 42.
• Simple Operation: The sight features straightforward controls for ease of use.

Advantages

• Durability: The robust construction means the ACRO P-2 can take a beating and still perform reliably, which is essential for a defensive pistol like the Glock 42.
• Consistent Performance: The closed-emitter design ensures that the point of aim remains unaffected by rain or debris.
• Always Ready: The outstanding battery life means the sight is always on and ready for use, which is crucial for a carry pistol where split-second reactions can be critical.

Disadvantages

• Price: The ACRO P-2’s advanced features and durability come at a premium price point, which might be a deterrent for some shooters.
• Size: While it is compact, it’s still a bit bulkier than some micro red dot competitors, which could affect holster compatibility and concealability.

Personal Experience

Once I had the ACRO P-2 mounted on my Glock 42, it felt like a tank of a sight—a good thing for durability, but it did take some getting used to. The added bulk was noticeable, but it didn’t take long to adjust to the new setup. In practice, the sight performed exceptionally.

The clarity of the dot and the ease of target acquisition were impressive, and it was comforting to know that the sight would be on whenever I needed it.

The price was a tough pill to swallow at first, but considering the features and the “install it and forget it” nature of the sight, I found it to be a worthwhile investment.

My only real concern was about concealment, as the sight does add a bit more to the silhouette of the weapon, but with the right holster, this concern was mitigated.

Online Customer Comments

• “Mounted the ACRO P-2 on my Glock 42 and it’s like a match made in heaven. Yes, it’s pricey, but the peace of mind knowing it’ll work in any condition is worth it.”
• “Love the battery life on this thing. I’ve been using it for over a year without a change. It’s a bit on the larger side for a micro red dot, but the performance is unbeatable.”
• “The ACRO P-2 feels indestructible, and the always-on feature is perfect for my daily carry. It does make the gun a tad bulkier, but you get used to it.”
• “Expensive, yes, but the Aimpoint quality is there. It’s survived everything I’ve thrown at it and keeps holding zero. I recommend it if you don’t mind the extra bulk.”

The Aimpoint ACRO P-2 is a top-tier optic that’s well-suited for the Glock 42, offering unmatched battery life and a ruggedness that inspires confidence.

While the size and cost may not appeal to everyone, the advantages of dependability, clarity, and continuous readiness make it a compelling choice for anyone serious about their gear.

It’s a sight that you can trust to perform when you need it most, and once you’ve experienced its reliability, it’s hard to settle for anything less.

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Conclusion

Selecting the best red dot sight for Glock 42 is a personal decision that depends on your individual preferences and shooting style.

By carefully considering factors like size, weight, durability, and performance, you can find the perfect optic to enhance your shooting experience and improve your accuracy.

The red dot sights we've discussed in this guide represent some of the best options available, offering a balance of functionality and reliability.