Laser Gun (Fallout 4)

The AER9 laser gun is a weapon in Fallout 4. Variants include the laser pistol and laser rifle.

Characteristics
Compared to the similarly modified Institute lasers, laser weapons offer superior damage with a slower rate of fire, however can do more DPS when fully modified. They can be found throughout the Commonwealth, but are particularly popular with the Brotherhood of Steel and the Gunners.

Variants

 * Old Faithful, a special laser pistol with the Instigating effect, which does double damage if the target is at full health. It is sold by Arturo Rodriguez in Diamond City.
 * Survivor's Special, a special laser pistol with the Bloodied effect, which deals more damage the lower your health is. It is a potential reward for completing the quest The Lost Patrol. It is also possible to steal the item from Paladin Brandis, before the The Lost Patrol quest ends.
 * If the quest is done at lower levels and without aligning with the Brotherhood, Brandis would be standing behind the door ready to pull the trigger. Should any of the speech checks fail to convince him the player will have no choice but to end his life. Which also results in the Paladin dropping the weapon allowing for an easy take.
 * Good Intentions, a special AER9 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, it can be found in a hidden room in the University Credit Union, which is opened by pressing a button inside a Master level safe. It has the Never Ending effect, which gives the weapon unlimited ammo capacity and never requires reloading, the magazine size is equal to all fusion cells currently in inventory.
 * Righteous Authority, a special AER9 laser rifle, given as a reward for completing the Call to Arms quest. With the Lucky effect, its critical hits do double damage and the critical meter fills 15% faster.
 * Wazer Wifle, a special AER9 Laser rifle with the same Never Ending property as the Prototype UP77 "Limitless Potential", is given as a reward for completing three unmarked quests for Shaun after finishing the main quest with any faction.
 * Protectron's Gaze, a special laser pistol with the Rapid ability, boosting its fire rate by 25%, and its reload time by 15%. It is carried by The Mechanist.

Locations

 * Commonly used by Gunners.
 * Standard issue for Brotherhood of Steel soldiers.
 * Used by super mutants at higher levels.
 * Apart from selling the Old Faithful, Arturo sells three more. Occasionally one will have an overcharged capacitor.
 * KL-E-0 usually sells one or two, and both come already modified.
 * Proctor Teagan sells one on a regular basis and is already pre-upgraded. He also sells a modified capacitor.
 * Sold at the Nuka-Cade for 15300 Nuka-Cade tickets (items rotate every couple of days).