3 Best Light for Glock 42

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Hey there, folks! I’m an experienced shooter who’s spent much time testing various lights on firearms, especially the Glock 42. 

Top 3 Best Lights & Lasers For Glock 42

I’ve been through the wringer to find out which light works best with the Glock 42. After extensive testing based on strict merits and criteria, the Streamlight TLR-6 has risen to the top of my list. 

I want to help you pick out the Best Light for Glock 42. With the market saturated with so many options, making the right choice can be overwhelming. But worry not; by the end of this article, you’ll know exactly what you’re looking for.

Top 3 Best Glock 42 Lights & Lasers

1. Streamlight TLR-6

A versatile, lightweight tactical light with a built-in red laser, designed for Glock 42.

Rugged Housing: This light isn’t just some flimsy piece of tech. The durable, shock-proof casing makes it ready for action, whether you’re at the range or facing an unexpected situation. It’s made to last and can take a beating without losing its shine.

100 Lumen Flashlight: The flashlight function provides 100 lumens of crisp light, making it ideal for nighttime or low-light settings. This isn’t your ordinary flashlight; it’s robust and bright enough to light your way during the darkest of nights.

Multiple Modes with Ambidextrous Switch: I appreciated the multiple modes and the easy-to-use switch that works for right- and left-handed folks. Choose from laser-only, flashlight-only, or a laser/flashlight combo based on what your situation calls for. It’s like getting three tools in one.

Easy Attachment: One of the best parts? This light attaches directly under your Glock 42’s trigger guard. No 

complicated setups or added bulk, it’s a straightforward installation that any gun owner can manage.

640-660nm Red Laser: Though not the most intense laser on the market, the red laser function offers an additional layer of accuracy. Trust me, it’s more than capable of getting the job done when you need it most.

Why I Love It: I adore the Streamlight TLR-6 for its versatility and how it perfectly fits my Glock 42. It’s not just a light; it’s a multi-purpose tool that meets most of my self-defense needs.

My Experience

Field testing this light was a rewarding experience. It was easy to mount, the flashlight and laser functions were both useful, and the multiple modes provided the adaptability I needed in varying conditions. It felt natural on my Glock 42 and didn’t weigh it down.


  • Versatile with multiple modes
  • Durable, shock-proof casing
  • 100-lumen flashlight
  • Easy to attach
  • Ambidextrous switch


  • Laser could be clearer
  • Slightly heavier than some other options

2. ArmaLaser TR5 Laser

A high-quality, grip-activated red laser sight specifically designed for Glock 42.

DuPont Zytel Polymer Construction: Let me tell you, the material on this laser sight is top-notch. Made from DuPont Zytel polymer, it’s built to be both durable and lightweight. 

This isn’t some generic plastic; it’s a polymer that can withstand heavy use, so you know it’s a lasting investment.

Grip Activation: The grip-activated switch is a standout feature. The laser activates the minute you grip your Glock 42 like you normally would. No extra buttons, no fumbling around; it’s as intuitive as it gets, making it invaluable in high-stakes situations.

635nm Bright Red Laser: The laser on this baby is bright. At 635nm, it outshines a lot of its 650nm competitors. This translates to better visibility and clearer targeting, which can be crucial in less-than-ideal lighting conditions.

Easy Battery Access: The thoughtful design extends to the battery compartment. No need to disassemble your Glock to swap out batteries. It’s a user-friendly detail that shows they’ve thought of everything.

Simple Installation: If you’ve ever mounted a laser sight before, you’ll find this one a walk in the park. Even if you haven’t, the installation is straightforward, attaching directly over the trigger guard of your Glock 42.

Why I Love It: The TR5 Red Laser Sight is a no-nonsense device that delivers where it counts. From the quality construction to the grip activation, it has features that I find both practical and efficient.

My Experience

I had an excellent time field-testing this laser sight. Installation was smooth, and the grip activation was a highlight for me. I didn’t have to change my grip or do anything different; the laser simply turned on when I held my Glock. 

Its performance met all my expectations and then some.


  • Bright, crisp laser
  • Grip activation for ease of use
  • Easy installation and battery access
  • Quality material construction


  • Less-recognized brand may cause hesitation

3. Viridian R5 Gen 2 Laser

A cutting-edge red laser sight that includes an ECR Instant-On Hybrid Holster for effortless activation.

ECR Instant-On Hybrid Holster: Now, this is cool. The ECR Instant-On feature is a game-changer. It activates the laser the moment you draw your Glock 42 and turns it off when you holster it back.

It’s like having a smart laser that knows what you need without you having to press any buttons. Of course, you have to use their specific holster, but it’s included in the package.

635nm Laser: This laser is also at 635nm, and boy, is it bright! This is a well-known brand for a reason. The laser is incredibly sharp and clear, aiding in targeting accuracy. It’s probably one of the brightest and crispest lasers you’ll find in the market today.

Easy Installation: Mounting this laser is a cinch. It fits over your Glock 42’s trigger guard like a glove. And the best part? It barely adds any weight to your firearm, making it feel as natural as possible during use.

Universal Appeal: This isn’t just for the pros; it’s a laser sight that’s as suited for civilian use as it is for law enforcement. Given its features and automatic activation, this is an all-around winner, no matter your needs.

Why I Love It: I’m all about that ECR Instant-On feature. It’s smooth, it’s intelligent, and it feels like it’s reading my mind. No fumbling with switches during critical moments makes it a winner in my book.

My Experience

I had a blast testing this laser sight. Installation? Easy. Functionality? Superb. Thanks to the Instant-On feature, it’s like the laser knew when to come on and off. There are no disappointments here, just pure performance and reliability.


  • ECR Instant-On activation eliminates manual operation
  • Ultra-bright 635nm laser
  • Easy to install and lightweight
  • Reputable brand


  • Limited to using the ECR Instant-On Hybrid Holster

Final Verdict

We’ve gone through some solid options for lights and lasers to pair with your Glock 42. After countless hours at the range and rigorous real-world testing, I can confidently say that the Streamlight TLR-6 wins.

When it comes to picking the perfect light, it’s not just about the specs; it’s about how those features translate into real-world use. 

Whether you’re a seasoned shooter or just someone who wants a reliable tool for self-defense, the best choice often boils down to individual needs and preferences. But for me, Streamlight TLR-6 checks all the boxes, making it my top pick.


What lasers fit Glock 42?

The lasers, such as Streamlight TLR-6, ArmaLaser TR5, and Viridian R5 Gen 2, are all compatible with Glock 42.

Is it worth it to buy a Glock 42?

Absolutely, its slim and light design makes it a great choice for daily concealed carry.

Glock 42 vs 43. Which is better for concealed carry?

The Glock 42 is better for concealed carry due to its smaller and slimmer dimensions.

How far is a Glock 42 accurate?

It’s effective at self-defense ranges of 10 to 30 feet and can hit 10-inch steel targets at 100+ feet.

Is the Glock 42 the smallest Glock?

Yes, the Glock 42 is the smallest in the lineup, making it highly concealable.

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I quit my job as a high-powered lawyer to pursue the outdoors. I spend most of my time fishing and hunting but am also an avid shooter with two years experience writing about firearms related topics.

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