Armasight Contractor 640 Review: High-Resolution Thermal Optics

The Armasight Contractor 640 utilizes the company's proprietary 12-micron ArmaCore thermal sensor, a standard for clarity in modern thermal optics. This sight features a 4.8-19.2x75mm configuration, which dictates its magnification range and objective lens diameter. Weighing 1.089 kg, or about 2.4 pounds, the unit is constructed with an alloy metal body intended for durability. It also adheres to MIL-STD compliance, which indicates that the housing is built to withstand varied weather and operational environments.\n\nPower is supplied by two CR123 batteries, providing up to four hours of continuous operation.

According to the manufacturer, this is a 50 percent longer run-time compared to similar thermal scopes on the market, meaning fewer battery swaps during extended field sessions. The integrated turret system functions as the primary interface for navigation, allowing users to adjust digital zoom, color palettes, and reticles without navigating nested software menus. Additionally, the inclusion of a digital compass and inclinometer assists in calculating distance, direction, and angles for more precise targeting.\n\nWhile the manufacturer highlights the build as more compact and lighter than conventional thermal scopes, weight remains a consideration for long-distance carries.

Buyers should weigh the benefit of the 1.089 kg mass against the rifle setup's overall balance. Although the four-hour battery life represents an improvement over market averages, users planning for overnight or multi-day expeditions must pack spare CR123 batteries to ensure uninterrupted performance. The device includes onboard storage and a wireless communication interface, features that help with recording and data transfer but also necessitate management of storage capacity.\n\nBuy it if you require a high-resolution 12-micron thermal core with a specialized turret interface for quick adjustments in the field.

It serves those who need integrated navigation tools like a digital compass and inclinometer alongside thermal imaging. Skip it if you primarily use scopes that rely on USB-rechargeable power sources, as the CR123 dependence may be less convenient for your workflow. Also, consider the total weight on your firearm before committing to this specific optic size.