The AGM Secutor LRF-C 50-640 is a clip-on thermal imaging system that turns your existing day optic into a thermal device in seconds, complete with a built-in precision laser rangefinder. It mounts in front of a rifle scope and adds thermal capability without forcing you to rezero, making it one of the most flexible night tools available. For shooters who want to keep their trusted day glass, the AGM Secutor LRF-C 50-640 is the answer.
What It Is and Who It Is For
This clip-on is for the hunter or professional who already runs a day scope they love and wants to add thermal without buying a dedicated night optic. It installs in front of rifle scopes with magnification up to 10X, so your existing setup stays intact for medium range engagements.
The built-in laser rangefinder measures the distance between you and the target and displays the result right in the scope’s monitor. Built by AGM, the Secutor LRF-C keeps operation simple with user friendly controls and ergonomic handling.
Key Features of the AGM Secutor LRF-C 50-640
- Clip-on design that converts a day optic into a thermal device fast.
- Built-in precision laser rangefinder with in-scope readout.
- Highly sensitive 12 micron thermal detector for a clear image.
- 1024 x 768 OLED monitor for a crisp picture in harsh conditions.
- Mounts in front of rifle scopes with magnification up to 10X.
- Powered by four replaceable Li-Ion batteries for over 6 hours of runtime.
Specifications Worth Knowing
The heart of this unit is a highly sensitive 12 micron thermal detector paired with a 1024 x 768 OLED monitor, a partnership that delivers a clear image even in the harshest weather. On the AGM Secutor LRF-C 50-640, that clarity is matched by a built-in rangefinder that puts exact distances directly in your field of view.
Four replaceable Li-Ion batteries keep the system running continuously for more than 6 hours, and an external 5V battery pack connects easily by USB to extend that time. The user friendly interface and ergonomic controls make setup and operation quick, even when you are working in the dark.
Practical Use, Care, and Compatibility
Because it clips in front of your existing scope, this system lets you switch between day and thermal use without disturbing your zero. Keep the objective capped when idle and clean the lenses only with proper optics supplies to protect the coatings and detector window.
It pairs best with quality day scopes up to 10X on AR platforms and bolt rifles. To match the AGM Secutor LRF-C 50-640 with a compatible mount and a solid day optic, browse our full optics collection.
The Flexibility of a Clip-On
The real appeal of a clip-on is that it lets you keep the day scope you already know and trust. You do not relearn a new reticle or rezero your rifle, you simply attach the thermal in front of your optic and gain night capability in seconds. When the sun comes up, you pull it off and your day setup is exactly as you left it.
The built in rangefinder is what sets this unit apart from simpler clip-ons, putting exact distances right in your scope so you can range and hold without adding another device to your rifle. The 12 micron detector and OLED monitor keep that image clear even when weather turns against you.
For the hunter who wants one rifle that works day and night without a full second optic, this clip-on is a smart, economical path. It maximizes the gear you already own and adds capability exactly where you need it.
Confirm that the clip-on sits square in front of your day scope and that your zero holds through it before you rely on it, keep spare Li-Ion cells and the external pack handy, and it will convert your day rig to thermal in seconds whenever you need it.
Add thermal to the scope you already trust with the AGM Secutor LRF-C 50-640 clip-on system. These optics ship direct where state and local law allows. Ships direct to your door, no FFL required.





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