Best Thermal Scope Clip-On Attachment 2026
Thermal clip-on attachments are a great upgrade for your day scope. Instead of replacing your optic with a dedicated thermal rifle scope, a clip-on mounts in front of your existing scope and converts it into a thermal system.
For foxing, pest control and night shooting in the UK, this setup has plenty of advantages.
You keep the glass quality and magnification range you get with standard rifle scopes, you can remove the thermal unit quickly when daylight returns, and many modern clip-ons deliver image quality that is not that far off what you see with a thermal riflescope.
The challenge for buyers is that clip-on thermals are still a specialist category. There are less models available than you get in the traditional thermal scope market, and performance differences between models can be significant.
In this guide we compare the best thermal clip ons currently available in the UK. The models included here were selected with input from Tom Butler at Uttings, who has worked with thermal imaging equipment and field sports optics for over two decades.
Quick Comparison: Best Thermal Scope Clip-On Attachments
| Model | Best For | Sensor | Objective Lens | Detection Range | Price | |
|---|---|---|---|---|---|---|
| Pulsar Krypton 2 FXG50 | Best Overall Clip-On | 640 × 480 | 50mm | 2300m | £2,299.95 | See Deals |
| HikMicro Thunder 3.0 TQ50CL | Premium Option | 640 × 512 | 50mm | 2600m | £3,075.00 | See Deals |
| HikMicro Thunder 3.0 TQ35CL | Best Mid-Range Option | 640 × 512 | 35mm | 1800m | £2,699.99 | See Deals |
| Nocpix Mate Lite | Best Compact Clip-On | 384 × 288 | 35mm | 1400m | £1,499.00 | See Deals |
| Nocpix Mate Ultra S60R | Best Long-Range Detection | 1280 × 1024 | 60mm | 3000m | £4,799.00 | See Deals |
Best Thermal Clip-On Attachment Overall: Pulsar Krypton 2 FXG50
For most UK shooters looking for a serious clip-on thermal system, the Pulsar Krypton 2 FXG50 sets the benchmark. It combines a high-resolution sensor, excellent image processing and a modular design that works with a wide range of riflescope setups.
Alignment is reliable, the image remains sharp across typical magnification ranges and the removable eyepiece module allows it to double as a handheld spotter.
Specifications
- Sensor resolution: 640 × 480
- Pixel pitch: 12µm
- Objective lens: 50mm
- Detection range: Up to approx 2300m
- Display: AMOLED HD
- Battery: Pulsar IPS series rechargeable battery
- Runtime: Up to approx 8 hours
- Weight: Approx 550g (without adapter)
Pros
- Excellent image clarity with high quality day scopes.
- Flexible design that can be used as both clip-on and handheld thermal spotter.
- Reliable mounting system with minimal point-of-impact shift.
Cons
- Premium price compared with entry-level thermal optics.
Best Premium Thermal Clip-On: HikMicro Thunder 3.0 TQ50CL
If money is no object and you want cutting-edge thermal performance, the HikMicro Thunder 3.0 TQ50CL is one of the most advanced clip-on systems currently available.
This model uses a high sensitivity sensor and integrates a laser rangefinder, which can be extremely useful when identifying foxes or other quarry at longer distances in open farmland. Image processing has also improved significantly in the Thunder 3.0 generation, producing a cleaner and more detailed thermal picture compared with earlier models.
If you are used to shooting in large fields or upland terrain, the additional detection capability and rangefinding functionality can be genuinely valuable.
Specifications
- Sensor resolution: 640 × 512
- Pixel pitch: 12µm
- Objective lens: 50mm
- Detection range: Up to approx 2600m
- Display: OLED
- Laser rangefinder: Integrated
- Battery: Replaceable rechargeable pack
- Runtime: Up to approx 6 hours
- Weight: Approx 540g
Pros
- Excellent image detail with strong thermal sensitivity.
- Integrated laser rangefinder for accurate distance measurement.
- Compact design for a high-performance clip-on.
Cons
- Premium performance comes with a premium price.
Best Mid-Range Thermal Clip-On: HikMicro Thunder 3.0 TQ35CL
The Thunder 3.0 TQ35CL sits in a particularly attractive position in the market. It offers the same sensor platform and modern image processing as the larger TQ50CL but with a slightly smaller objective lens and lower overall cost.
For many UK shooting scenarios this makes perfect sense. Most foxing and pest control takes place well within a few hundred metres, meaning the extreme detection ranges of the larger models are rarely required.
The TQ35CL therefore delivers excellent thermal clarity while remaining a more balanced investment.
Specifications
- Sensor resolution: 640 × 512
- Pixel pitch: 12µm
- Objective lens: 35mm
- Detection range: Up to approx 1800m
- Display: OLED
- Laser rangefinder: Integrated
- Battery: Replaceable rechargeable pack
- Runtime: Up to approx 6 hours
- Weight: Approx 520g
Pros
- High resolution sensor delivers strong image clarity.
- Excellent balance between performance and price.
- Compact design suited to typical UK shooting distances.
Cons
- Detection range slightly lower than larger 50mm thermal systems.
Best Compact Thermal Clip-On: Nocpix Mate Lite
The Nocpix Mate Lite clip on works best if you care about weight and handling. Many clip-on thermals add bulk to the front of a rifle, which can affect balance during longer outings.
The Mate Lite reduces this issue while still delivering respectable thermal performance. Its 384 sensor cannot match the image detail of high-end 640 systems, but it remains more than capable for typical pest control distances.
For mobile shooting setups where manoeuvrability matters, this compact design can be a major advantage.
Specifications
- Sensor resolution: 384 × 288
- Pixel pitch: 12µm
- Objective lens: 35mm
- Detection range: Up to approx 1400m
- Display: OLED
- Battery: Internal rechargeable battery
- Runtime: Up to approx 7 hours
- Weight: Approx 420g
Pros
- Compact and lightweight design.
- Easy to handle during longer outings.
- Solid performance for typical pest control ranges.
Cons
- Lower sensor resolution compared with premium thermal clip-ons.
Best Long-Range Thermal Clip-On: Nocpix Mate Ultra S60R
The Mate Ultra S60R represents a new generation of high-resolution thermal clip-on technology. With its large 1280 sensor, it delivers an exceptional level of image detail compared with traditional 640 systems.
This extra resolution can make it easier to detect animals at extreme distances before they move within shooting range.
Specifications
- Sensor resolution: 1280 × 1024
- Pixel pitch: 12µm
- Objective lens: 60mm
- Detection range: Up to approx 3000m
- Display: OLED
- Laser rangefinder: Integrated
- Battery: Rechargeable battery system
- Runtime: Up to approx 6 hours
- Weight: Approx 600g
Pros
- Extremely high sensor resolution.
- Very strong long-range detection performance.
- Integrated laser rangefinder.
Cons
- Large objective lens increases size and weight.
How to Compare Thermal Scope Clip-On Attachments
Sensor Resolution vs Image Processing
Sensor resolution is often the first specification buyers notice. Higher resolution sensors capture more thermal information, which can produce clearer images and improved target identification.
However, raw resolution alone does not determine image quality. Modern thermal devices rely heavily on image processing software to enhance contrast, reduce noise and sharpen outlines.
Detection Range vs Practical Shooting Distance
Manufacturers often advertise detection ranges of two kilometres or more. While technically accurate, these figures typically represent the distance at which a heat source can be detected rather than clearly identified.
In real UK shooting conditions most engagements occur well within a few hundred metres, meaning image clarity at moderate distances is often more important than extreme detection claims.
Clip-On vs Dedicated Thermal Scope
Clip-on thermals serve a different purpose from traditional thermal rifle scopes.
A dedicated thermal scope replaces your day optic completely and includes its own digital reticle and zeroing system. A clip-on sits in front of your existing scope, allowing you to retain the same optic and reticle you already trust.
Thermal Scope Clip-On Attachment FAQs
Are thermal clip-ons better than thermal rifle scopes?
Not necessarily better, but they offer different advantages. Clip-ons allow shooters to retain their existing day scope and zero.
Do clip-on thermals affect rifle zero?
High quality clip-on systems are designed to minimise point-of-impact shift when properly mounted.
Can thermal clip-ons be used during the day?
Yes. Thermal imaging detects heat rather than visible light.
Are thermal clip-ons legal in the UK?
Thermal imaging equipment is legal, but its use must comply with firearms and landowner permissions.
Do you need a special day scope for a clip-on thermal?
Most clip-ons work best with traditional optical riflescopes with moderate magnification.
How We Compiled This List
This list has been edited and curated by Tom Butler at Uttings. Tom has spent over 25 years working hands-on with optics and field sports equipment. His experience with these models helped us choose the clip-on thermals that perform the best in everyday UK shooting conditions.