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BEAST C-336 Thermal Clip-On Attachment
Thermal clip-on attachment
> BEAST C-336 Thermal Clip-On Attachment

Superior for medium- and long-range engagements

Automatic shatter based thermal core
Automatic or manual Shutter Calibration
Nitrogen purged
High resolution AMOLED Display
Precise internal lens focusing mechanism
Manual display brightness adjustment
Switchable image polarity: White Hot / Black Hot / Colored Hot

Ability to center the screen with respect to the viewed reticle

Best when paired with 3.0x-12.0x daytime optics
Battery status indicator
Can be used with heavy recoil weapons, including .300 WIN, .338LM and .50 cal.
TV Out connector to allow video recording (mountable DVR option)


The Bering Optics BEAST-C 336 Thermal Clip-on Attachment is exceptionally lightweight and compact. It can be simply mounted in front of the daytime scope using a clip-on mounting system, making the conversion quick and easy since no re-zeroing is required. The clip-on is built with the superb Germanium optics that is paired with advanced Vanadium Oxide (VOx) uncooled thermal core and proprietary electronics. The Bering Optics BEAST-C 336 Thermal Clip-on Attachment comes with a menu that is easy to understand and navigate. In addition, the control buttons are designed with the tactile elements allowing the user to operate without looking at the buttons. The device is nitrogen-purged, and is water-, dust- and shock-proof. For optimum performance, there is a wide range of menu-driven options including switchable image polarity. BEAST-C 336 Thermal Clip-on Attachmentis action ready in virtually any environment or light conditions including conditions when the environmental obscurants such as smoke, dust, haze, fog, are present.

Product Modification


Product SKU#


Optical Magnification, x


Objective lens system


Angular FOV at 1.0x (horizontal x vertical), degree

6.5° x 5.0°

Focus range, yds / m

5.5 / 5 to infinity

Core resolution, pxl


Pixel pitch, µm


Image refresh rate, Hz


Thermal Sensitivity (NETD), mK

< 50

Display type and resolution, pxl


Start-up time, min., sec.


Object type and size, approx., ft² / m²

8 / 0.75

25.8 / 2.4

Detection, approx., yds / m

1100 / 1000

2200 / 2000

Recognition, approx., yds / m

330 / 300

990 / 900

Identification, approx., yds / m

190 / 170

440 / 400

Dimensions, in / mm

8.27"x2.95"x2.95" / 208x75x75

Weight,  approx., oz/g

19.9 / 565

Power supply standard

CR123 (two)

Estimated battery life, hour

Up to 4

Operating temperature, °F/°С

-40° to +122° / -40° to +50°

Water intrusion


Humidity, %

Up to 98%

In Box
  • BEAST-C 336 Thermal Clip-on Attachment 
  • Front lens flip-up protective cap
  • Soft Carrying Case
  • Two CR123 Batteries
  • Lens Cleaning Cloth
  • Instruction manual
  • 1.5 feet video cable with 3.5mm RCA male connector plug
Оptional accessories

BEAST-C 336 is compatible with the following optional accessories:

  • Rubber Eye Guard (Light Suppressor)
  • 2.0x eyepiece (BE80220) to convert the device into a 2.0x Thermal magnifier that can be coupled with M52/37 Camera/Video Adapter
  • Rifle Mount
  • Throw level adaptor. Below table shows the most popular diameters, however, there are total 38 sizes available that can be special ordered

SKU- Diameter, mm SKU- Diameter, mm

BE80930-  30
BE80936-  36     
BE80940-  40
BE80942-  42
BE80946-  46
BE80948-  48
BE80950-  50
BE80952-  52

BE80957-  57
BE80958-  58
BE80960-  60
BE80962-  62
BE80964-  64
BE80968-  68
BE80972-  72
BE80980-  80

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