DRS Technologies will supply light, medium and heavy weapon thermal sights for the US Army and US Marine Corps under a $140m contract.

The weapon thermal sight features menu-based push-button controls, which allow fast and easy polarity, brightness and reticule adjustment.

It also incorporates 25-micron, uncooled infrared technology to provide the soldier with a thermal image of target information.

The light weapon thermal sight offers wide field-of-view (FOV) during military operations on urbanised terrain and also narrow FOV for detection and recognition of distant targets.

The medium and heavy weapon thermal sights are equipped with 3×e-zoom, each interfaces with a variety of 52 and 103mm telescopes, and are specifically designed for crew-served weapons.

Powered by a four-pack of L91 tactical batteries, the light weapon thermal sight lasts for 25 hours. The medium and heavy sights are powered by six packs of L91 batteries with an 18-hour life.

Manufacturing work will be carried out at the company’s facilities in Florida and Texas, and the thermal sights will be delivered to the US Army by December 2011. US Marines will receive deliveries between October 2010 and July 2011.