The Burris Thermal Scope S35 Gen 2 400x300 12um (MPN: BO300617) is a dedicated nighttime hunting optic engineered for precise target acquisition and tracking in total darkness. Also known as the BTS35 v2, this thermal scope is built around a 400x300 VOx thermal sensor with a 12µm pixel pitch and a 50Hz frame rate. Thermal signatures are projected onto a 1024x768 color OLED display. The upgraded 35mm F1.0 manual-focus objective lens captures significantly more infrared radiation than older F1.2 designs, improving overall image contrast in the field.

To support extended field operations, the unit utilizes a dual-battery system consisting of an integrated internal rechargeable battery and a hot-swappable, removable 18650 rechargeable battery. This configuration delivers up to 5 hours of continuous runtime at a 25°C baseline. For Australian users, charging is handled via a 5V USB-C interface (USB-C to USB-A cable included), which connects to standard local AU-plug USB wall adapters or portable power banks. The unit mounts securely via an included American Defense Mfg Quick-Detach (QD) Picatinny Rail Mount with an adjustable cantilever.

Key Features

• VOx Thermal Sensor: Features a 400x300 resolution core with a 12µm pixel pitch and 50Hz refresh rate.
• Upgraded Optics: Equipped with a 35mm F1.0 manual-focus objective lens to maximize thermal contrast.
• Flexible Magnification: Combines 3.2x optical magnification with a smooth 1x to 4x digital zoom for total magnification up to 12.7x.
• Advanced Targeting Tools: Offers 10 customizable reticle options, Picture-in-Picture (PiP) mode, Hot Track target pinning, and a stadiametric rangefinder.
• Diverse Color Palettes: Includes seven color settings (White Hot, Black Hot, Red Hot 1, Red Hot 2, Red Hot 3, Blue Hot, and Green Hot).
• Rugged Housing: Features an IP67 waterproof and dustproof rating, alongside an 800G recoil rating for high-shock durability.

Specifications

• MPN: BO300617
• Dimensions: 294mm x 80mm x 78.5mm
• Operational Weight: 870 grams (including mount)
• Detection Range: Up to 1,000 meters for deer-sized targets
• Connectivity: Wi-Fi integration with the BurrisConnect mobile application

Who is the Thermal Scope S35 Gen 2 400x300 12um for?

• Nighttime predator controllers — require the high-shock durability of an 800G recoil rating to keep this thermal scope reliably zeroed on heavy-caliber predator rifles.
• Invasive pest management shooters — need a mobile, streamlined setup, utilizing this thermal scope’s 870 grams operational weight to reduce physical fatigue during long foot patrols.
• Hunters tracking game in complete darkness — rely on the 3.2x optical magnification of this thermal scope to quickly scan and identify targets within close-to-medium range.

Less suitable for: long-range identification beyond a 1,000 meters threshold, where a thermal scope with a larger 50mm objective lens variant or a higher-resolution 640x512 thermal core is required.