The AN/TVS-5A is a portable, battery-operated; GEN III I2 device used for observation and aimed fire of weapons at night. The AN/TVS-5A can be tripod mounted for surveillance; however, it is generally used in the Marine Corps as a crew-served weapon sight on the M2 .50 cal Machine Gun, and MK19 40mm Machine Gun.
Obsolete as of Sept 2013!!
The Expeditionary Fire Support System (EFSS) will be the final system of the land-based fire support triad that includes the LW 155 and HIMARS. It is designated to accompany the MAGTF in any expeditionary mode of operations. It will be the primary indirect fire support system for the vertical assault element of the ship-to-objective maneuver (STOM) force. The EFSS shall be capable of 110 nautical mile lift internal to the CH-53E aircraft. The Expeditionary Fire Support System (EFSS) is a fire support system that is designated to accompany the MAGTF in any expeditionary mode of operations.