SIG SOEC31200 ECHO CRQ35 384X288 3.5-28X35

The SIG Sauer ECHO RQ35 thermal rifle scope brings practical thermal imaging to hunters and shooters who need reliable heat detection without the bulk of larger systems. Built around a 12-micron LWIR thermal core with 50Hz refresh rate, this compact 3.5–28x35mm scope delivers the responsiveness you need for close-to-mid-range engagements while staying light enough to keep your rifle handling natural and fatigue-free. The 384x288 thermal resolution cuts through darkness, dust, and brush to separate heat signatures with crisp contrast, letting you identify targets fast and shoot with confidence.

Thermal rifle scopes demand balance between capability and usability—and the RQ35 nails that equation. Its 30mm maintube, sub-32-ounce weight, and compact 14.8-inch profile won't slow you down on the move or behind the glass during long glassing sessions. You get eight color palettes to adapt to different conditions and terrain, and IP67 waterproofing means weather won't shut you down. The 12-hour internal battery keeps you in the field without frequent charging, and you can swap in an 18500 external cell when you need extended runtime.

What sets the ECHO RQ35 apart is integration with SIG's BDX 2.0 ecosystem. Using the mobile app, you can record and stream thermal footage, adjust settings remotely, and share what you're seeing—a genuine advantage for team hunts, training, or documentation. The less-than-20mK thermal sensitivity means you'll pick out game and details other shooters might miss, especially in the transitional light where thermal shines brightest.

Key Features

• 12-micron LWIR thermal core with 50Hz refresh—responsive and smooth for moving targets
• 384x288 thermal resolution—crisp heat contrast for fast detection and confident ID
• 3.5–28x variable magnification—flexibility from mid-range to extended engagements
• 35mm objective—optimized for light gathering and wide situational awareness
• Compact, balanced design—31.7 oz and 14.8 inches overall length preserve rifle handling
• BDX 2.0 enabled—record, stream, and configure via smartphone app
• 12-hour runtime with internal battery plus 18500 external support—stay in the field longer
• Eight color palettes—adapt thermal display to lighting and target contrast
• IP67 waterproofing—dependable in rain, snow, and tough conditions

Specifications

Frequently Asked Questions

What kind of thermal rifle scope is the SIG ECHO RQ35?

The ECHO RQ35 is a compact, variable-power thermal rifle scope designed for hunters and shooters working at close-to-mid-range distances. It pairs a 12-micron thermal core with a 3.5–28x magnification range and a 35mm objective, balancing detection capability with field maneuverability.

Can I use the SIG ECHO RQ35 on different rifles?

The RQ35 features a standard 30mm maintube, which is compatible with most rifle scope rings and mounts. Always verify your specific mount system before purchase, but the 30mm standard fits most hunting and tactical setups.

Does the ECHO RQ35 work in complete darkness?

Yes. Thermal imaging detects heat, not light, so the RQ35 functions fully in complete darkness, low-light conditions, and through obscuration like dust, light fog, and brush—anywhere there's a heat signature to detect.

What's included with the SIG ECHO RQ35, and how long will the battery last?

The scope comes with an internal rechargeable battery that delivers 12 hours of runtime. You can extend operation with an optional 18500 external battery. The BDX 2.0 app lets you monitor battery status and configure settings via your smartphone.