Fallout: New Vegas The Initiation v.2.0

Description
The Initiation is a quest-chain centered on the idea of doing odd jobs for the Great Khans. Do well enough, and they might let you join up... To begin the Initiation, speak to Rivas in Red Rock Canyon.
The Initiation contains a new revolver, two new melee weapons, a spiffy non-faction-specific set of Khan armor, a new safehouse for players who want to live in a cave, and access to a very high-end arms merchant with a primary stock of energy weapons. Upon successful completion, the Great Khans will back the player up in any fight they happen to get in, assuming Khans are present to help, of course

To install use Nexus Mod Manager.
Definitely requires Honest Hearts and Lonesome Road.