If you want to follow suit with a Power Armor and heavy weapon build, then here is where to get a Gatling Laser in Fallout 76. To get a Gatling Laser in Fallout 76, tackle Public Events ...

According to TheBlackShark_77, Liberty Prime, the Fallout Power Armor, Gatling laser, and Fat Man are all designs by other LEGO fans, although they have purchased the parts and built them themselves.