Brotherhood T-51b Power Armor

The  is a piece of armor in Fallout: New Vegas. Unlike the Capital Wasteland Brotherhood of Steel, who rely on older sets of T-45d power armor salvaged from the Pentagon, the Mojave chapter has access to large numbers of this rarer and much more powerful suit.

Characteristics
Brotherhood T-51b power armor provides a damage threshold of 25 as well as a bonus of 1 to Strength and +25% Radiation resistance. It can be repaired with T-51b power armor. To be able to equip it as a usable item you must first complete Power Armor Training.

This armor acts as a Brotherhood of Steel disguise, which will make NCR hostile towards you (Unless you have peacefully completed the Brotherhood section of For the Republic, Part 2).

Locations
You can find it on dead Brotherhood of Steel members in the Still in the Dark quest:
 * Two can be found just outside the Nellis Air Force Base. You can find it while avoiding the artillery shells flying at you; or gain entrance to Nellis then come back and search in relative safety.
 * Two can be found on the third floor of the REPCONN Headquarters. You'll find two downed Brotherhood of Steel members, one under a  fallen chunk of ceiling, the other against the wall, a few feet from Piers Isley's Briefcase.
 * Two can be found in a radioactive crater east of "Hidden Valley" (If you only find the body of the dead paladin with the logs, the other body probably glitched into the wall). About 5 centaurs are in and around the crater including a bigger centaur called Moe.
 * Four more can be looted from dead Paladins depending on how you finish Veronica's quest, I Could Make You Care.
 * Can be obtained from Hidden Valley if the player has the Mister Sandman perk and kills sleeping paladins. (Doesn't turn any BOS characters hostile)

Bugs

 * Sitting on a bench or couch while wearing the armor will cause the shoulder guards to move out of place.
 * After declaring peace between the Brotherhood and the NCR, regular soldiers will not attack you with the armor on, but Rangers will "see through your disguise" and attack you.
 * The NCR will attack you if you wear this armor but doesn't seem to care if Veronica is wearing it and Major Knight at Mojave Outpost will even repair it for you.

Appearances
The appears in Fallout: New Vegas.