Pulsar Krypton 2 FXG50 Thermal Clip-On
The Pulsar Krypton 2 FXG50 is a front thermal clip-on: it mounts ahead of your existing day scope so you add thermal without re-zeroing. On a 640x480 sensor with a fast F50/1.0 germanium lens, it is for hunters who already have a day rifle dialed in and want night capability on the same setup, or a thermal monocular when detached.
Pros
- Mounts in front of your day scope - add thermal with no re-zero
- 640x480 sensor with 1920x1080 AMOLED for clean, high-contrast image
- Fast F50/1.0 lens; detection cited to 2,500-plus yards
- Doubles as a handheld thermal monocular when detached
- Lightweight magnesium housing, IPX7 and shockproof, Stream Vision 2
Cons
- Requires a correctly sized adapter for your day scope's objective
- Image depends on the day-scope pairing, not a purpose-built reticle
- Flagship 640 pricing - the FXQ35 variant costs less for less reach
- ITAR export-controlled
How a clip-on differs from a dedicated scope
A clip-on is the key distinction to understand. Instead of replacing your optic like a dedicated thermal riflescope, the Krypton 2 attaches to the objective of your day scope through an adapter. Your day scope keeps its own zero, and you simply remove the clip-on for daytime use. That means one rifle, one zero, used day and night. The tradeoff is that image quality and reticle control come from a combination of two devices rather than a purpose-built thermal scope, so setup and adapter fit matter more. For the category overview, see our thermal clip-ons page and the best thermal clip-ons shortlist.
Sensor, optics, and image quality
The Krypton 2 XG50 carries a 640x480 thermal sensor with NETD below 40mK, paired with a high-definition 1920x1080 AMOLED display for strong contrast and sensitivity to small temperature differences. The fast F50/1.0 germanium lens drives a long detection range - specs cite 2,500-plus yards - which is why it doubles so well as a scanning monocular. Built-in Wi-Fi, onboard video recording, and Stream Vision 2 compatibility round out the feature set, so you can stream, record, and update firmware from a phone.
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Variants: FXG50 vs FXQ35 and the XG35
The lineup gives you a sensor-and-lens choice. The FXG50 is the flagship 640x480 unit on a 50mm-class objective for maximum reach and detail. The FXQ35 steps down to a 384x288 (XQ) sensor on a 35mm lens, a lighter, lower-cost option for shorter-range work, and the XG35 keeps the higher-resolution G sensor on a smaller objective. Across variants an adapter sized to your day scope's objective is required - matching that adapter correctly is essential for a clean, concentric image. Verify the right adapter for your scope before buying.
Build and who should look elsewhere
At roughly 0.97 pounds with the IPS7 battery, the Krypton 2 is compact for a 640 clip-on. A magnesium-alloy housing dissipates heat for stability in extreme temperatures, and it carries an IPX7 waterproof and shockproof rating. If you would rather not stack a clip-on on an existing scope - or you want flagship reticle features purpose-built into the optic - a dedicated Thermion or value Talion scope may fit better. Hunters on a tighter budget who scan more than they shoot might weigh a lower-resolution clip-on or an older Core attachment.
Specifications
| Spec | Value |
|---|---|
| Sensor / resolution | XQ35- 384x288 17µm |
| Weight | 1.275 pounds |
| Length | 8.5 inches |
| Width | 3.0 inches |
| Height | 3.3 inches |
Frequently Asked Questions
Does the Krypton 2 need re-zeroing?
No. Because it clips in front of your existing day scope, your day scope keeps its zero. You attach the Krypton 2 for night use and remove it for daytime without touching your zero, which is the main advantage of a clip-on over a dedicated scope.
What adapter do I need?
You need an adapter matched to your day scope's objective-bell diameter. Correct adapter fit keeps the thermal image concentric with your optic. Confirm the right adapter for your specific scope before ordering the Krypton 2.
What is the difference between the FXG50 and FXQ35?
The FXG50 uses a higher-resolution 640x480 sensor on a 50mm-class lens for maximum detail and reach. The FXQ35 uses a 384x288 sensor on a 35mm lens - lighter and cheaper, better for shorter-range hunting.
Can the Krypton 2 be used as a standalone monocular?
Yes. Detached from the rifle it works as a handheld thermal monocular for scanning, and its long detection range makes that a practical second use.
Is the Krypton 2 better than a dedicated thermal scope?
It depends on your setup. The Krypton 2 is ideal if you want to keep a day rifle you already shoot and add night capability. A dedicated Thermion scope gives purpose-built thermal reticles and controls but commits that rifle to thermal.
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