Regulator duster (Fallout 3)

The Lawbringer Perk - which is accessible from Level 14 on - places the Regulator HQ on your map and allows you to visit Sonora Cruz, the head of the Regulators. The Regulator Duster is a piece of armor that you obtain from Sonora Cruz when you join up with the Regulators.

You can also get it by having negative karma and killing (and looting) the Regulators that come after you.

It is cosmetically identical to the sheriff's duster, the only difference being the missing sheriff badge.

Appearance
The appears only in Fallout 3.