File:MCPO insignia.png

Summary
Insignia for the UNSC Navy rank Master Chief Petty Officer.

Reference: This insignia can be seen attached to the memorial in the final cutscene for the level "Halo" in Halo 3.

Original file located here.

Released into the public domain, as confirmed here: http://en.wikipedia.org/wiki/Image:MCPO_GC.png