If you've been looking for a versatile night hunting setup, you've probably heard a lot of buzz about the rh25 clip on thermal. It's one of those rare pieces of gear that actually lives up to the hype, mostly because it tries to do everything and, surprisingly, succeeds at almost all of it. Most thermal units are built for one specific job—they're either a dedicated scope, a handheld scanner, or a helmet-mounted monocular. The RH25 (often called the Rico Micro) manages to wear all those hats without feeling like a compromised, "jack of all trades, master of none" type of device.
What Makes This Little Unit So Special?
The first thing you notice when you get your hands on an rh25 clip on thermal is just how tiny it is. It's roughly the size of a soda can, maybe even a bit smaller, which is wild when you consider the tech packed inside. It's rocking a 640x512 resolution sensor with a 12-micron pixel pitch. In plain English? The image is incredibly crisp. You aren't looking at blurry blobs; you're seeing actual heat signatures with enough detail to tell the difference between a family of hogs and a group of deer from a serious distance.
The real magic, though, is the "clip-on" functionality. A lot of guys hate the idea of having a dedicated thermal rifle because it means that gun is only good for night hunting. With this unit, you can take your favorite bolt gun or AR that already has a reliable day optic on it and just slap the RH25 in front. It's designed to maintain your zero, so you don't have to spend an hour at the range every time you want to switch from day to night mode.
Using It as a Clip-On vs. Standalone
While it's marketed heavily as a clip-on, it's just as capable as a standalone thermal sight. It has internal reticles, so if you want to mount it directly to a rail and use it as your primary optic, you totally can. But let's be real, most people are buying the rh25 clip on thermal to use in front of a low-power variable optic (LPVO) or a red dot.
When you use it as a clip-on, you're looking through your day scope at the RH25's internal screen. Because the screen is so high-quality (it's an AMOLED display), you can crank your day optic's magnification up to about 4x or even 6x before the image starts to get too pixelated to be useful. This gives you a massive advantage over traditional thermal scopes that have a fixed base magnification. You get the familiar reticle of your day scope combined with the heat-sensing power of the RH25.
Mounting and Compatibility
Mounting is where some people get a little confused, but it's actually pretty straightforward. It uses a quick-detach system that's fairly repeatable. If you're using it as a clip-on, you'll likely use a side-flip mount or a fixed bridge. One thing to keep in mind is that the height of your day optic matters. You want the centers to align as closely as possible, though the RH25 is pretty forgiving.
It's also worth mentioning that it comes with a dedicated "clip-on mode." When you toggle this, it optimizes the screen layout so your day optic is looking at exactly what it needs to see. It's a small detail, but it makes a huge difference in how the image feels when you're behind the glass.
Taking It to the Helmet
This is where the rh25 clip on thermal really pulls away from the competition. Most clip-ons are way too heavy and bulky to put on your head. If you tried to mount a standard thermal clip-on to a helmet, you'd probably need a neck brace by the end of the night.
The RH25 is light enough that you can bridge it with a PVS-14 or just run it as a standalone thermal monocular on a Wilcox mount. For guys who do a lot of "stroll and scan" hunting, this is a lifesaver. You can walk around with the unit on your helmet to find the animals, and then, once you're ready to take the shot, you can pop it off the helmet and clip it onto your rifle in seconds. It's a level of fluidity that you just don't get with other thermal systems.
The Image Quality and Sensor Performance
We mentioned the 640 resolution earlier, but it's worth diving into why that matters. Thermal imaging is all about contrast and "NETD" (Noise Equivalent Temperature Difference). The lower the number, the better the sensor can pick up tiny differences in temperature. The rh25 clip on thermal is incredibly sensitive. On a humid night or right after a rainstorm—conditions that usually make thermal images look like gray mush—this thing still manages to pull out details in the tree line and terrain.
You've also got several color palettes to choose from: white hot, black hot, red hot, and "rainbow" or "outline" modes. Most serious hunters stick to white or black hot, but the outline mode is actually pretty cool for navigation because it highlights the edges of objects without washing out the entire screen with heat data.
Video Recording and Features
In today's world, if you didn't film it, did it even happen? The RH25 has onboard recording and can even stream to an app via Wi-Fi. It's got 64GB of internal storage, which is plenty for a few nights of hunting highlights. The menu system is controlled by a few buttons on the top of the unit. It's not a touchscreen—thankfully—because trying to use a touchscreen with gloves on in the dark is a nightmare. The buttons are tactile and easy to find by feel once you've spent an hour or two with the device.
Battery Life and Power Management
If there's one "weak point" with high-end thermals, it's usually the battery. Pushing a 640 sensor and a high-res screen takes a lot of juice. The rh25 clip on thermal typically runs on a single 18650 battery (with the extended cap) or an 18350.
If you're running it on an 18350, you're only going to get a couple of hours. That's why most guys immediately swap to the 18650 cap. With a high-quality 18650, you can get about 4 to 5 hours of continuous use. It also has a USB-C port, so if you're sitting in a blind, you can just plug it into a small power bank and run it all night long.
Is It Worth the Investment?
Let's be honest: this isn't a budget-tier optic. It's a serious piece of equipment. However, when you look at the cost of buying a dedicated thermal scope ($3k-$5k) and a dedicated thermal monocular ($2k-$4k), the price of the rh25 clip on thermal starts to look like a bargain. You're getting both tools in one package.
The durability is also top-notch. It's IP67 rated, meaning it can handle being out in the rain or getting bumped around in the back of a truck. It feels like a solid chunk of aluminum because, well, it is. It doesn't have that "plastic toy" feel that some cheaper thermal units have.
Wrapping It Up
At the end of the day, the rh25 clip on thermal is perfect for the hunter who wants maximum flexibility. Whether you're scanning the woodlot from a helmet mount, using it as a handheld to spot hogs in a field, or clipping it onto your bolt action for a 200-yard shot, it just works.
It bridges the gap between different shooting styles better than almost anything else on the market right now. If you're tired of carrying multiple devices or you just want one thermal that can do it all, the RH25 is definitely the one to beat. It's changed the way a lot of us look at night hunting, making it more streamlined, more efficient, and, honestly, just a lot more fun.