Old Faithful

Old Faithful is a unique laser pistol found in Fallout 4.

Characteristics
Old Faithful bears the Instigating effect, which does double damage if the target is at full health, making it a strong choice early in the game for stealthy characters, as a sneak attack against an enemy at full health will deal quadruple the base damage. The specific weapon modifications fitted to the gun when purchased are level dependent and will vary. As with all laser pistols in Fallout 4 it can be converted to a rifle, expanding its usefulness to Rifleman characters as well as Gunslingers and Commandos.

Variants

 * Laser gun, the standard variant.
 * Survivor's Special, a unique laser pistol with the Bloodied effect, which deals more damage the lower your health is. It is a potential reward for completing The Lost Patrol, or it can be stolen from Paladin Brandis before completing the quest.
 * Good Intentions, a unique laser rifle with the Enraging effect which, on critical hits, causes targets to frenzy. It is carried by Clint.
 * Prototype UP77 "Limitless Potential", a unique laser gun with the Never Ending effect, which gives the weapon unlimited ammo capacity and remove the need for reloading. It can be found in a hidden room in the University Credit Union.
 * Righteous Authority, a unique laser rifle. With the Lucky effect, its critical hits do double damage and the critical meter fills 15% faster. It is given as a reward for completing Call to Arms.
 * Wazer Wifle, a unique laser rifle with the Never Ending effect, which gives the weapon unlimited ammo capacity and remove the need for reloading. It is given as a reward for completing three unmarked quests for Shaun after finishing the main quest with any faction.
 * Protectron's Gaze, a unique laser pistol with the Rapid ability, boosting its fire rate by 25% and its reload time by 15%. It is carried by the Mechanist.

Location
Sold by Arturo Rodriguez in the Diamond City market.