Ranger Sequoia

The  is a pistol in Fallout: New Vegas.

Characteristics
This large revolver is carried only by the elite rangers, which fires more powerful rifle ammo rather than handgun ammo. It is the unique version of the hunting revolver.

Most likely modeled after the Colt .44 Dragoon revolver. The Dragoon was co-designed by Samuel Colt for the US Army Mounted Rifles known as "The Dragoons" (Go figure). Just a historical side-note.

Locations
A more useful method is to simply pickpocket his ammunition. Then attack him Unarmed, and immediately cease firing, so he stops. If you do this, he will switch to his knife. The Ranger Sequoia is now in his inventory and can be pickpocketed (done successfully with Sneak 25).
 * Camp Golf, inside House Resort. You can kill Hanlon to get it. A suggested method of doing this is to do the quest, 'Return to Sender.' At the end, chose the option to turn Hanlon in. He will ask that you send an NCR Ranger to do the job, but as soon as you leave, he locks himself in. After a brief announcement, he will commit suicide, leaving you with the Ranger Sequoia to collect for yourself. Note: There is a chance that the Ranger NPC (that runs to the Chief's room after he shoots himself) will not leave the room, meaning that you cannot pick up the revolver without flagging theft. In this case, use the grab function to pick up the Ranger Sequoia and move it to a safe location where you are flagged as Hidden in stealth mode before picking it up.

Appearances
The appears in Fallout: New Vegas.