The Rein Micro — A Compact Powerhouse of a Light

You want the world’s most potent weapon light, but you’re also a bit of a manlet. A big heavy weapon light is just too much for your underdeveloped biceps. The OWL is too heavy, as is the REIN. What’s a guy to do? Well, then I present to you the Rein Micro.

I tease, I tease, I get it. The OWL doesn’t work well with lasers for NODs guys, and the REIN is a bit large for an Mk18 or PDW-style rifle. Like Goldilocks porridge, the REIN Micro is just right. Cloud Defensive continually changes the game by producing high-end, high-power weapon lights that have changed the conversation.

Cloud Defensive REIN Micro weapon light
It’s a good day when I get to use my AK.

Lots of people still talk lumens, lumens, lumens, but let’s change the conversation. Let’s talk candela y’all. Cloud Defensive weapon lights don’t ignore lumens, but they put greater importance on candela than lumens. We measure the raw power of light by lumens, but when you discuss candela, it’s all about usable light.

Candela pushes lumens forward and gives users range and power. While the REIN Micro is a smaller light, it doesn’t stray from the Cloud Defensive philosophy. Let’s take a look at the numbers.

Rein Micro By The Numbers

The REIN Micro is 4.91 inches long and weighs 5.75 ounces with the battery in place. Numbers matter, but let’s personify that. The Surefire X300 is a pistol light and weighs 4 ounces, and is 3.6 inches long. Surefire’s Scout light Pro weighs 4.8 ounces and measures 5.5 inches long.

As you can see, Micro seems a bit misplaced. More like REIN Medium, but let’s be fair… that doesn’t roll off the tongue very well. What about power? Well, the REIN Micro packs 1,300 lumens and is backed by 55,000 candelas. It outperforms the aforementioned Surefires by a large margin.

Cloud Defensive REIN Micro weapon-mounted light
A little bright light goes a long way for home defense and at home pest control.

Lights this small usually use CR123s but do not use 123s with the Micro. They fit, but the use of CR123s will damage your light and void your warranty. Stick with 18350 rechargeable batteries. The Micro comes with one, as well as a Nitecore charger.

Combat Based Ergonomics

Cloud Defensive has made some substantial improvements to the ergonomics of all lights. All this work clearly shows in the REIN Micro. The controls are fantastic. At the rear of the light sits a tail cap push button that offers both momentary and constant modes. A soft push is momentary, and a hard, intentional press turns the light on constant.

Cloud Defensive REIN control button
The button is large and easy to use for both momentary and constant use.

The button is massive and easy to find in the dark. It offers some resistance, so negligently discharging the light isn’t easy. If you prefer a remote switch, then you’re covered too. Not only are you covered, but you get an outstanding remote switch too.

Cloud Defensive REIN Micro remote switch
The texturing allows you to determine which is constant and which is momentary.

The REIN Micro uses a two-button remote switch. One button is dedicated for constant and one for momentary. When you fiddle around in the dark, it’s easy to understand which button is which. The constant button has a tactile and raised Cloud Defensive logo, and the momentary button does not.

Cloud Defensive REIN Micro weapon mounted light, banana magazine, Travis Pike.
The REIN Micro can be used with both the remote or clicky tail cap….at the same time.

The means by which the remote switch attaches to the light is rather brilliant. The rear of the light has four notches, and the tail cap has four slots that connect to the notches. One of these notches has a wire that leads to the remote switch. You can rotate the tail cap to allow the cord to travel in one of four directions.

Cloud Defensive REIN Micro remote switch, banana magazine
The two-button design allows for a dedicated button for both a momentary and constant source.

This design allows for the use of both a remote switch and tail cap switch, as well as complete control over where the cable goes.

Cloud Defensive REIN Micro remote switch cable
Notice how it’s orientated towards the logo.

Why not make your cable management easy and your cable snag-free? Cloud Defensive seemingly cracked the code, and it works well.

Cloud Defensive REIN Micro adjustable remote switch cable
Now it’s orientated away from the logo.

Extreme Durability

Cloud Defensive is a bunch of animals when it comes to testing their lights. Check out their Instagram to see them using their lights to drive nails, tossing them off buildings, and beyond. The REIN Micro has a 3mm thick lens, making it the thickest in the industry. It’s capable of withstanding multiple 5.56 simmunition rounds.

Cloud Defensive REIN Micro bezel
The bezel is strong enough to be an impact device!

Should it ever break, it’s user-serviceable and replaceable. Cloud Defensive uses an S7 Tool steel bezel ring, and heat treats it to a 53 Rockwell level of hardness. This makes the bezel an effective impact tool.

The light can be submerged for 24 hours and is shock and dustproof. It wears an NTOA Member Tested and Recommended badge. It’s a tough freaking light.

REIN Micro in Real Life

All the numbers in the world mean nothing until you blast a beam of light into the universe. So, how powerful of a beam do 1,300 lumens and 55,000 candelas generate? Well, powerful enough that you really need an optic to make the most of its effective range.

Cloud Defensive REIN Micro beam at 50 yards.
At 50 yards you can see the target in living color with ease.

At 100 yards, I can see and make positive identification of a target and send lead downrange when necessary. Even out to 200ish yards, the combination of a magnified optic makes it possible to see and engage a target with confidence.

The overhead photonic barrier makes it difficult to see into the dark.
See how hard it is to see into the dark when an overhead photonic barrier is between you and the darkness?

It’s not all about long-range power. The REIN Micro stairs down photonic barriers with ease too. A photonic barrier is essentially a wall created by light that makes it tough to see beyond the light. Ever have someone hit you with a flashlight, and you can’t see beyond the light? Well, that’s a photonic barrier.

REIN Micro weapon light beam cutting through overhead photonic barrier.
Well, look how the Rein Micro cuts through that barrier!

Let’s say a streetlight is between you and something you want to see. It’s tough to see through the light to whatever is on the other side. That is a photonic barrier. A light like the REIN Micro blasts through those barriers. It will shine through a streetlamp and illuminate what’s on the other side, and overcome most flashlight beams.

Got The Beam

The beam itself is warm, and when I say warm, I’m talking about the color of the beam. It’s yellowish, almost like the old MagLite beams. However, it’s much more powerful than any MagLite. That beam warmth offers a few advantages.

First, the warmer color makes it easier to see colors, and the light won’t disorient the colors or make them appear slightly different in color. A cold blue beam can distort the colors and make them harder to see.

Cloud Defensive REIN Micro weapon light, brightness.
This thing is superbly bright

Second, besides the lumens and candela, the warm beam is why the REIN Micro penetrates photonic barriers so dang well.

A clear and distinct hot spot is present and will be the brightest part of your light. There is a fair amount of spill that gives you good peripheral vision illumination. It can be used indoors comfortably and is perfect for home defense.

You hit a home intruder with a beam like this, and they will be disoriented and in pain. This beam is punishing to be on the other side of. It hurts a lot and creates a powerful photonic barrier itself.

Cloud Defensive REIN Micro weapon-mounted light.
The REIN Micro shaves some size and weight from the Rein, but is still not a super small light.

Since ammo has been what it is, I’ve been extending beyond my normal educational experiences. I’ve been learning about lights, lasers, and NODs, and as far as I can tell, this is the most powerful compact light on the market. Combine the power with the unbeatable durability the excellent ergonomics, and the REIN Micro comes out on top over and over.

I believe the REIN Micro is the best compact weapon light on the market.

Travis Pike is a former Marine Machine Gunner, a lifelong firearms enthusiast, and now a regular guy who likes to shoot, write, and find ways to combine the two. He holds an NRA certification as a Basic Pistol Instructor and is the world's Okayest firearm's instructor.

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