The sub-system includes a thermal weapon sight and laser range finder to provide the soldier with range and direction information.

Thermal Weapon Sight (Boa)

As with regular thermal sensors, thermal weapon sights can operate in total darkness or through light concealment (smoke, haze, fog, light rain).

It included the weapon itself, plus components such as a daylight video sight, thermal weapons sight and MFL (Multi-Function Laser).

A thermographic weapon sight, thermal imagery scope or thermal weapon sight is a device combining a compact thermographic camera and an aiming reticle.

Thermal Weapon Sight (TWS) - for employment with the F88 Steyr rifle to improve the surveillance and target acquisition capability of small teams.

The AN/PAS-13B Thermal Weapon Sight (TWS) is an infrared sight developed for the United States military by Raytheon.

The rifle is also issued as part of the FÉLIN infantry combat system outfitted with a Sagem Sword Sniper 3-in-1 optic, which serves as a telescopic sight, thermal weapon sight, and laser rangefinder.

In December GDLS also received an order amounting about 40% of a US$48 million order for loader's thermal weapon sights being part of the TUSK system improvements for the M1A1 and M1A2 Abrams Tanks.

The US Armed Forces designates version 2 as MTWS (Medium Thermal Weapon Sight), and version 3 as HTWS (Heavy Thermal Weapon Sight).

The FIST project has also seen upgrades to the existing Qioptiq CWS (4x) and Maxi-Kite (6x) night vision scopes, and the introduction of the FIST Thermal Sight, following operational experience with the VIPIR-2+ thermal weapon sight in Afghanistan.