Laser designator
From Halopedia, the Halo wiki
This Unknown Laser Pointer is a United Nations Space Command piece of equipment [1].
It was first seen during the short video, Halo: Last One Standing, by an injured UNSC Marine Orbital Drop Shock Trooper during the Battle of Western Pakistan.
The ODST in this video used this device to acquire the coordinates of Sierra 1-1-7 (Spartan 117) as he entered the Earth's atmosphere.
Trivia
- The butt-stock and pistol grip are the same as featured on the SRS99D-S2 AM Sniper Rifle.