Description
Dual-function optic merges traditional red dot clarity with thermal overlay capability, eliminating the need to choose between daytime precision and thermal detection.
Night hunting and property monitoring no longer require switching between separate optics or sacrificing performance. The Holosun DRS-TH combines a fully functional red dot sight with thermal imaging overlay, letting you instantly detect heat signatures while maintaining the fast target acquisition of a standard reflex sight. Simply flip the lens cap to switch between modes—thermal fusion for low-light detection or pure red dot for daytime shooting—giving you two complete optical systems in a single 18.5-ounce package.
Key Features
- Dual-Mode Operation: Functions as a standalone red dot sight or thermal fusion optic; flip the front lens cap down to use as a traditional reflex sight, flip up to activate thermal overlay for detecting warm-blooded targets in darkness or heavy cover
- 256×192 Thermal Sensor with Five Display Modes: White Hot, Black Hot, Outline, Highlight, and Fusion modes provide flexibility for different environments and lighting conditions; 50 fps refresh rate delivers smooth thermal imaging on a crisp 1024×768 OLED display
- Extended Battery Performance: Thermal mode operates up to 10 hours on dual 18350 rechargeable batteries; red dot mode provides over 50,000 hours of runtime, ensuring the optic remains functional even when thermal capability isn’t needed
- Integrated Video Recording and Digital Zoom: Captures photos and videos to 32GB internal storage with single-button operation; 1x, 3x, and 5x digital zoom extends effective observation range for target identification
Important Compatibility Notes
- Thermal Effective Range: Optimal thermal detection and target identification range is approximately 75-100 yards; larger targets like deer-sized game may be detected out to 200-300 yards under good conditions, though identification becomes difficult beyond 100 yards
- Field of View Considerations: The sight’s thermal field of view is relatively narrow compared to dedicated thermal scopes; better suited for engaging known target locations rather than scanning large areas
- Resolution Limitations: The 256×192 thermal sensor provides adequate resolution for detection but may not offer sufficient detail for positive identification of similar-sized animals (e.g., distinguishing between coyote and dog) at extended ranges
Why We Carry It
The DRS-TH earned “Best of Show” recognition at SHOT Show 2023, marking a significant achievement in making thermal technology accessible without the typical four-figure price premium of dedicated thermal scopes. We stock this sight because it addresses a specific gap in the market: shooters who need occasional thermal capability but don’t want to carry separate optics or invest in a dedicated thermal scope. The ability to use this as a primary red dot for daytime shooting while having thermal overlay available for dawn, dusk, or nighttime scenarios makes it particularly valuable for predator hunting, property patrol, and multi-purpose rifles where weight and versatility matter more than maximum thermal performance.
Frequently Asked Questions
How does the thermal performance compare to dedicated thermal scopes?
The DRS-TH uses a 256×192 sensor with an effective range of 75-100 yards for clear target identification, which is substantially less than dedicated thermal scopes in the $3,000+ range. However, it excels as a dual-function optic where you need both red dot and thermal capability without carrying two separate optics. For close-range applications like hog hunting within 100 yards or nighttime property security, the thermal performance is adequate, though users seeking longer-range thermal imaging or maximum resolution should consider dedicated thermal scopes.
Can I use this with a magnifier for longer-range shots?
While you can mount a magnifier behind the DRS-TH for daytime red dot use, the thermal mode’s image quality degrades noticeably when digitally zoomed beyond 3x magnification, and adding optical magnification to already-digital thermal imaging produces grainy results. Most users report best results keeping the optic at 1x and using digital zoom sparingly. The sight is optimized for close to moderate range applications rather than precision long-range shooting.
What mounting height and rail space does this require?
The DRS-TH requires standard Picatinny rail mounting and includes a mount in the package. At 18.5 ounces and measuring 3.7 inches in length, this sight is noticeably larger and heavier than traditional red dots due to the integrated thermal system. The included mount provides co-witness height, though some users upgrade to taller mounts like Unity Tactical risers for improved ergonomics, particularly when wearing helmets or using with night vision equipment.
Spec Sheet
OPTICAL SPECS
- Reticle: 2 MOA Dot & 65 MOA Circle
- Light Wavelength: 650nm
- Reticle Color: Red
- Parallax Free: Yes
- Unlimited Eye Relief: Yes
- Magnification: 1x
- Multi-Coatings: Yes
ELECTRONIC SPECS
- Power Source: Battery
- Battery Type: 18350
- Battery Life (Hours): 10 Hours (Thermal Mode)
- Thermal Modes: White Hot / Black Hot / Outline / Highlight
- Digital Modes: Thermal Fusion
- Video Recording: Internal
- Screen Refresh Rate: 50 FPS
- Digital Screen: 1024×768 OLED
- Brightness Setting: 8 DL & 4 NV
PHYSICAL SPECS
- Window Size: 1.25×0.98
- Dimension (in): 3.7×2.2×3.5
- Weight (oz): 18.5
MECHANICAL SPECS
- Housing Material: 7075 T6 Aluminum
- Surface Finish: Anodize
- Adjustment per Click: 0.5 MOA
- W&E Travel Range: ±50 MOA
ENVIRONMENT SPECS
- Storage Temperature: -40℃~70℃
- Working Temperature: -20℃~51℃
- Submersion: IP67
- Vibration: 1000G
MAGNIFICATION SPECS
- Digital Zoom: 1x, 3x, 5x
- Transmittance: N/A
- Diopter: N/A
- Field of View: N/A
- Eye Relief: N/A
- Exit Pupil: N/A
- Magnification: Digital
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