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Questions & Answers
How does this secure to the rifle? I don’t see a picatinny clamp like the other clip-on thermals have.

Attaches via “NiteHog Viper 35 QR Adapter”. It’s like a modified scope end cap. It’s also depicted in the pictures.

by Big D, Verified Owner, September 14, 2025
Will this clip on fit a night force atacr 7x35 with a 56mm objective

It’s should, but you’ll need to buy that specific size modified scope end cap, around $50-60 bucks. Attaches via “NiteHog Viper 35 QR Adapter”.

by Big D, Verified Owner, September 14, 2025
Customer Reviews
Expert Review
Lightweight, Compact, and Superb by Hunter, Gear Expert, June 26, 2023
The Nitehog Viper-35 is the lightest and most compact thermal clip-on I have used with a length of 46mm and a width of 63mm and weight of 254g. Despite its size and weight, its build quality is robust and durable. The Viper is built from one solid p...
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Helpful Positive Review
Viper Thermal by Tom, June 15, 2023
Very impressed with the image quality on this thermal. Punches above its weight class so to speak. I have used other thermals with 640 resolution that do not look as clear and crisp as the image on the Viper 35. No lag when scanning or searching. The...
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3/3 found this helpful
Helpful Positive Review
Thermal is the future! by Henry, June 16, 2023
Saw this at a local gun shop in SoCal and knew this was the way. I've seen others at the big box stores from ATI and the cool FLIR but this was just too cool. It has a scope mode and a view mode so you can use it as a handheld or mount it to your opt...
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2/2 found this helpful
Helpful Positive Review
I've always been accustomed to needing both an observational thermal device, along with a dedicated thermal riflescope. Not only did the Nitehog eliminate that need, but the fact that it's as small and compact as it is makes it a better option than ...
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2/2 found this helpful
Helpful Positive Review
The smallest and lightest thermal imaging clip-on with a 35 mm focal length and magnesium alloy body. Exceptional image details, more than 1500 yards detection distance on a target with sizes 71x24 inches. Super precision and POI repeatability regar...
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2/2 found this helpful
Helpful Positive Review
Viper 35 review by Echo2ranger, October 2, 2023
Little package with a big bang. Monocular, rifle scope clip on......Best of boreferring! This thing even works on prism scopes! Only down side I have found so far is having too many different rifle scope objective lens sizes....thus I had to order 5...
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1/1 found this helpful
Read All 8 Reviews

We've got an AWESOME deal for you!

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Color:
Black
Sensor Resolution:
320x240 pixels

Code: 5I3-TCL-NV35-NH001

MPN: NH001

UPC: 648346484735

Blazin' Deal
List: $1,999.00Save $118.95
$1,880.05

Product Info for NiteHog Viper 35 1x29.17mm Thermal Monocular

VIPER is the smallest, lightest, and most compact device in its class, measuring at only 254 grams (without battery). Its sophisticated low-profile clip-on design eliminates the need to remove your day sighting equipment since the device mounts directly in line with a standard daytime rifle scopes without the need of any tools. Most importantly, you do not need to re-zero the rifle every time you change the sight, which means point of impact always stays the same. VIPER provides uncompromised precision in the repeatability of the point of impact. Due to our rigorous individual device testing, we can guarantee a standard deviation of up to 3 cm per 100-meter distance without alignment or zero deviation per 100-meter distance with alignment performed. By matching our powerful F 1.2 lens with a sensitive cutting-edge sensor, VIPER provides incredible detection capabilities. A standard object of 1.8 meters can be spotted up to 1380 meters away even in challenging outdoor conditions.image

WARNING: California`s Proposition 65

Specifications for NiteHog Viper 35 1x29.17mm Thermal Monocular:

Manufacturer: NiteHog
Color: Black
Magnification: 1 - 4 x
Objective Lens Diameter: 35 mm
Sensor Resolution: 320x240 pixels
Battery Type: Lithium Ion
Battery Life: 5 Hours
Length: 1.81 in
Width: 2.48 in
Height: 5.23 in
Weight: 254 g
Range of Detection: 1380 m
Resolution: 1024x768 pixels
Water Resistance Level: IP66

Features of NiteHog Viper 35 1x29.17mm Thermal Monocular

  • WATER RESISTANCE VIPER carries the IP 66 certification
  • LONG RANGE DETECTION up to 1510 yards (1380 m)
  • EASY TO USE pictogram menu for quick operation
  • LONG BATTERY LIFE VIPER has up to 5 hours of battery life
  • NO MAGNIFIER You do not need an additional magnifier in observation mode
  • SENSITIVE LENS with F 1.2 to absorb more light and assure detailed and contrast image
  • DURABLE HOUSING made of resistant magnesium alloy and matte anti-reflective coating
  • EXTENDED WARRANTY ensure maximum product lifespan (see warranty conditions)
  • GUARANTEED PRECISION - VIPER provides uncompromised precision in the repeatability of the point of impact. Due to our rigorous individual device testing, we can guarantee a standard deviation of up to 3 cm per 100-meter distance without alignment or zero deviation per 100-meter distance with alignment performed.
  • INCREDIBLE DETECTION RANGE OF OVER 1500 YARDS - By matching our powerful F 1.2 lens with a sensitive cutting-edge sensor, VIPER provides incredible detection capabilities. A standard object of 5'10" can be spotted over 1500 yards away even in challenging outdoor conditions.
  • A-CORE MODULE - Developed by Nitehog, the A-Core is an ultra-compact imaging engine, based on cutting-edge hardware solutions and dedicated video processing algorithms, that provides superior image quality and proven precision in the hardest environmental conditions.
  • CLEAR REAL-TIME IMAGE - By using a sophisticated germanium objective lens with scratch resistant hard carbon coating and a 12-micron pixel pitch, the VIPER provides the fastest 60 Hz frame rate on the market, which means crystal clear observation of any object with no lag.
  • SHARP VISION WITH NITEHOG IMAGE RAZOR - The Nitehog Image Razor technology enables our versatile software processing which applies different enhancements to ensure clear and sharp vision in a variety of environmental conditions such as fog, rain, snow, smoke, and total darkness. The level of those alterations depends on the customers preference to the image they see and can be applied to any scene.

Package Contents:

  • NiteHog Viper 35 1x29.17mm Thermal Monocular
  • Transportation Box
  • 2x Battery Set
  • Battery Charger
  • Lenspen
  • Neck Strap
  • Counter Ring
  • Cleaning Cloth
  • Cordura Bag

NiteHog Viper 35 1x29.17mm Thermal Monocular Orderable Models

List of Orderable Models

  • NiteHog Viper 35 1x29.17mm Thermal Monocular, 60 Hz, 320x240, Black, NH001 , MPN: NH001 , UPC: 648346484735 , Code: 5I3-TCL-NV35-NH001
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Last updated 2026-07-15 UTC.