Arrive at peaceful resolutions by using superior firepower.”
Found in Raven Rock on the right desk in Colonel Autumn's bedroom. After passing the huge door from section 2B to 2C, the hallway will extend further and end with doors on the left and right. Take the left door to retrieve the bobblehead inside the room. Be sure to grab it before entering the Control Room on the way to see President Eden, as there is no returning for it after that point.
The bobblehead seems to be carrying a weapon similar to the alien blaster.
Video tutorial for finding Energy Weapons Bobblehead: