Night hunting is growing fast—especially across the South where hogs and coyotes are always on the move. But swapping rifles or re-zeroing optics between day and night setups? That’s a hassle. Enter the Armasight Operator 640 Thermal Clip-On, a high-res thermal unit that mounts directly in front of your LPVO (low-power variable optic), letting you instantly convert your day rifle into a thermal-ready rig.
And here’s the kicker: you won’t lose zero.
The Operator 640 is a thermal clip-on optic—meaning it mounts forward of your existing rifle scope (like a 1-4x, 1-6x, or 1-8x LPVO). You keep your daytime setup exactly as is. Add the Operator 640 when the sun goes down, and you’re scanning and shooting with thermal accuracy. It’s fast, intuitive, and—yes—it’s really that easy.
Built for hunters, this compact thermal unit brings high-end features without overcomplicating things. No deep menus, no fragile attachments, and no need to re-zero every time you mount or remove it.
Let’s break down what sets this thermal clip-on apart from the rest:
That’s the real question, right? According to testers in the field, the answer is a solid yes.
After mounting and dismounting the Operator 640 half a dozen times, the rifle’s zero stayed consistent. The thermal seamlessly aligned with the optic every time it was remounted. That means you can pop it on for a night hunt, then take it off the next morning and continue using your daytime optic without re-sighting in.
That’s huge—especially for hunters running precision scopes or custom zeroed rigs.
Let’s be honest—thermal is just plain fun. But it’s also functional.
On a recent hog hunt, the Operator 640 proved its value. You could tell boars from sows, estimate body size, and detect clear outlines rather than the glowing blobs you sometimes see on lower-res models. The edges were crisp, the contrast was clean, and the image quality was outstanding, even through brush.
Thanks to the thermal zoom and customizable palettes, hunters could fine-tune their image preferences for every terrain and target.
If you're only going to buy one thermal device—make it the Armasight Operator 640. This is hands-down one of the most user-friendly, high-performance thermal clip-ons available right now.
You don’t have to build a whole new rifle setup for night hunting. Just mount the Operator 640 in front of your daytime optic, turn it on, and go hunt.
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