L30 Gatling laser

The  is an energy weapon in Fallout, Fallout 2, and Fallout Tactics.

Fallout and Fallout 2
Commonly regarded as the ultimate energy weapon, the L30 saw use (post-War) by Brotherhood of Steel Paladins, Unity Nightkin and even Enclave soldiers (even though Advanced Power Armors have a 90% resistance against laser damage, which means the user has to rely on critical hits to do significant damage).

Locations

 * Canyon City, Found on humanoid robot
 * Vault 0, Found in multiple places