R91 assault rifle (assault rifle of fallout 3) was the standard assault rifle of the US armed forces.
Type 93 assault rifle (chinese assault rifle) was the standard assault rifle of the chinese armed forces.
Energy weapons were basically experimental.
Considering the Fallout Universe's Federal law enforcement group, Bureau of Alcohol, Drugs, Tobacco, Firearms, and Lasers (their equivalent to our ATF,) included
Lasers in it's name, I'd say energy weapons weren't "basically experimental" by the time of Great War, but were rather a common, if not, blooming form of firearms.