The Great Khan armory is an unmarked location in the Mojave Wasteland. It is located in a basement of a destroyed house northeast of the Spring Mt. Ranch State Park, at the south entrance of Red Rock Canyon.
The armory is accessed through a pale yellow cellar door outside of the house. It is occupied by an unnamed Great Khan and the Great Khan armorer. She will trade with the Courier if they have enough fame with the Great Khans.
Great Khan armory appears only in Fallout: New Vegas.