RM-225L Thermal Riflescope 256 1-4x 25mm
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The Onick RM-225L is a 256-class thermal riflescope with a 25 mm objective and 1–4x magnification, built for hunting after dark and predator control. A built-in laser rangefinder measures the distance to the target so holdover is set from a reading rather than an estimate. Onick fits 32 GB of on-board photo and video, Wi-Fi streaming to a phone, and a Picatinny mount. Covered by Onick's 18-month limited warranty against manufacturing defects. Key features: • 256×192 VOx sensor, 12 μm pixel pitch • 25 mm objective, 1–4x digital zoom • 1,312 yd human detection range • Built-in laser rangefinder • 32 GB onboard photo and video, Wi-Fi streaming to a phone • Runs on two CR123A batteries, 4+ hours • IP67, Picatinny rail, 800G shock rated • 18-month Onick limited warranty
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Overview
The Onick RM-225L is a 256-class thermal riflescope with a 25 mm objective and 1–4x magnification, built for hunting after dark and predator control. A built-in laser rangefinder measures the distance to the target so holdover is set from a reading rather than an estimate. Onick fits 32 GB of on-board photo and video, Wi-Fi streaming to a phone, and a Picatinny mount. Covered by Onick's 18-month limited warranty against manufacturing defects.
Key features:
• 256×192 VOx sensor, 12 μm pixel pitch
• 25 mm objective, 1–4x digital zoom
• 1,312 yd human detection range
• Built-in laser rangefinder
• 32 GB onboard photo and video, Wi-Fi streaming to a phone
• Runs on two CR123A batteries, 4+ hours
• IP67, Picatinny rail, 800G shock rated
• 18-month Onick limited warranty
Questions & Answers
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Why This Product
The RM-225L Thermal Riflescope 256 1-4x 25mm is a dedicated thermal scope built for hunters who need reliable heat detection after dark. Its 256px sensor delivers clear, reliable thermal imagery in most conditions. A built-in laser rangefinder gives you exact distance for precise holdover, and the optic identifies heat signatures out to 1312 yards. At 17.35 oz, it's lightweight enough for all-day carry without fatigue. Backed by 18-month warranty and Thermisight's veteran-owned service team.
Expert Video Reviews
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See the RM-225L Thermal Riflescope 256 1-4x 25mm in action — hands-on reviews, field tests & comparisons
Field Footage Gallery
Onick Support
RM-225L Thermal Riflescope 256 1-4x 25mm
Factory support, warranty service, and replacement parts for this model come directly from Onick.
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- $1,255
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Key specifications
- Detector
- 256×192
- Detection range
- 1,312 yd
- Magnification
- 1–4×
- NETD
- —
- LRF
- Laser
- Refresh
- 25 Hz
Specifications
- Sensor
- 256×192 VOx uncooled
- Pixel pitch
- 12μm
- Magnification
- 1-4X
- Objective
- 25mm
- Detection range
- 1,200 m / 1,312 yd (human)
- Refresh rate
- 25 Hz
- Display
- OLED 1024×768
- LRF
- integrated laser rangefinder
- Storage
- 32 GB onboard photo/video
- Connectivity
- Wi-Fi 2.4 GHz streaming to phone
- Battery
- CR123A (16340) ×2
- Runtime
- ≥4 hrs
- Shock resistance
- 800G
- Rated recoil
- 6000 J
- Mount
- Picatinny rail
- Ingress protection
- IP67
- Weight
- 492 g (17.4 oz)
- Warranty
- 18 months (Onick limited)
- Origin
- China
- Export
- Sold for U.S. end use only
Sample Thermal Images
Real thermal imaging samples captured with this camera — swipe to browse, tap any image to view full size.
Compare detection range & sensitivity
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| Range | 100yd | 150yd | 200yd | 250yd | 300yd | 400yd | 500yd |
|---|---|---|---|---|---|---|---|
| Drop (in) | -2.1 | -2.0 | 00.0 | +4.1 | +10.6 | +31.5 | +64.7 |
| Hold (MOA) | -2.0 | -1.3 | 0 | 1.6 | 3.4 | 7.5 | 12.4 |
Point-mass model integrating the standard G1 drag curve, 2.5 in sight height, sea-level air. For reference only — always confirm with your own chronograph and field testing.
RM-225L Thermal Riflescope 256 1-4x 25mm ballistic engine
This scope's built-in LRF and ballistic calculator can store custom drop profiles. Enter your zero data above, then program the holdover values into the scope's ballistic profile manager for one-button range-corrected shooting.
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Lens Care
- •Use only microfiber cloths and lens cleaning solution designed for coated optics — never paper towels or shirt sleeves.
- •Blow off dust with a bulb duster before wiping to avoid scratching the germanium lens coating.
- •Store with lens caps on when not in use to protect the objective and eyepiece.
Battery & Power
- •Remove batteries during long-term storage (>30 days) to prevent corrosion.
- •Charge to 80–90% before extended storage; avoid leaving fully discharged for long periods.
- •Use only manufacturer-approved batteries and chargers — aftermarket cells can cause thermal runaway.
Storage & Environment
- •Store in a dry, climate-controlled environment between 32°F and 77°F.
- •Avoid leaving in a hot vehicle — extreme heat degrades the thermal sensor over time.
- •Keep the optic in its case during transport to prevent impact damage to the internal sensor.
Zero & Calibration
- •Re-check your zero after any significant impact or temperature change >40°F.
- •Run the onboard NUC (non-uniformity correction) calibration before each hunting session for best image quality.
- •If your reticle drifts, contact our warranty team — don't attempt to disassemble the optic yourself.
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