O/I optics device

The O/I (Ocular/Integration) optics device is a helmet attachment worn by snipers in the United Nations Space Command armed forces. They are employed by ODST donning the sharpshooter variant of the ODST armor and UNSC Army personnel.

Human-Covenant War
During the Fall of Reach, O/I devices were worn as attachments UNSC Army soldiers' CH252 helmets and the ODST helmets worn by the ODSTs. During the Battle of Mombasa, ODST sniper Kojo Agu employed an O/I module on his helmet.

Installation 07 conflict
During the conflict on Installation 07, this attachment saw use by Marine snipers across the ring.

List of appearances

 * Halo: Helljumper
 * Halo 3: ODST
 * Halo: Reach
 * Halo Infinite