Arizona Scavenger

Arizona Scavenger is an unmarked quest in Fallout: New Vegas.

Detailed walkthrough
After speaking with Aurelius of Phoenix, he offers the character a bounty on the lives of NCR soldiers. For proof, Aurelius will require NCR dogtags to be brought to him. With a barter skill of 35, the cap reward can be changed to ammunition and/or supplies. To inquire about the ammunition and/or supplies, you will have to see Decanus Severus. To easily find NCR dogtags, it is best to head to areas with a high NCR population. These areas include Camp McCarran, Camp Forlorn Hope, Camp Golf, Hoover Dam and Mojave Outpost. Locate Aurelius of Phoenix and turn in the dogtags, you will be paid in caps for every dogtag you turn in; if you succeed at the Barter check you can trade them with Decanus Severus for ammunition, firearms, explosives, armor or food depending the amount of dogtags turned in.

These are the available trade options for Decanus Severus:
 * Ammunition: each dogtag corresponds to 10 rounds of 9mm or 10mm or .22 LR or .357 magnum or 20 gauge shotgun shells or energy cells.
 * Armor: 15 dogtags for a leather armor, 20 dogtags for a leather armor, reinforced
 * Explosives: every 3 dogtags can be traded for one frag grenade or dynamite
 * Firearms: 20 dogtags for a 9mm submachinegun, 30 dogtags for a 10mm SMG, 25 dogtags for a laser pistol, 50 dogtags for a laser rifle
 * Food: Various types of food of different quality depending on the amount of dogtags turned in.

Bugs

 * If you ask for firearms, explosives, or armor, you will lose 5 dog tags just for asking.