Security uniform

s are a variant of Combat Armor in Fallout 3, coming in two versions with different appearances but identical stats.

The Rivet City Security Uniform and the matching Rivet City Security Helmet are the standard protection for members of Rivet City Security whereas the Tenpenny Security Uniform is worn by the guards of Tenpenny Tower. The Tenpenny Security Helmet can be found in the game files but is not actually used in the game.

Characteristics
The two Security Uniforms have the lowest damage resistance out of all Combat Armor variants, offering slightly less protection than even the Talon Combat Armor. Nonetheless, they provide better protection than most clothing worn in the wasteland, including Merc Outfits and Raider Armors, and convey a small bonus (+5) to Small Guns.

Repair
Both armor variants can be repaired with each other or other Combat Armor variants and can likewise be used to repair those. The helmets can be repaired with other Combat Helmets or be used to touch up those in turn.

Rivet City Security Uniform
The black-colored Rivet City Security Uniform and Helmet are worn by the Rivet City Security guards at Rivet City. Visually, the uniform appears to be scratched and worn. It also seems to have a very faint camouflage pattern if looked at closely enough (more visible on the female version of the armor). The helmet is comprised of a black Combat Helmet and a Plexiglas face shield.

It can be obtained by looting the bodies of dead guards. Since the security guards at Rivet City will respawn indefinitely, taking this off their bodies can be a practical if murderous way to repair other armors if needed.

It is possible that this variant of combat armor could have been used by the pre-war navy of the United States, or at least by a sort of security personnel assigned to the aircraft carrier.

Tenpenny Security Uniform
The khaki-colored Tenpenny Security Uniform is given to all of the security guards at Tenpenny Tower. The matching helmet can be found in the game files but is not actually used in the final game.

You can obtain it either by killing a guard or by siding with Roy Phillips during the quest Tenpenny Tower and looting the guards' corpses after the slaughter. Post slaughter the armor found will most likely be at 100% for reasons unknown. If you want a non-violent solution, you can reverse-pickpocket it off Gustavo.

Appearances
Rivet City Security Uniform and Tenpenny Security Uniform appear only in Fallout 3.