M199 assault rifle

The M199 was the official infantry weapon of the U.S. Army.

Characteristics
Firing standard 5.56mm rounds, the gun was described as the "most well-recognized weapon in the modern U.S. Military arsenal" before the Great War. The M199 earned the nickname "the Backtalker" from the unusual report the firing mechanism makes as it ejects a spent shell. It was displayed as part of a museum exhibit on loan from the International Ordnance Museum at the Museum of Technology in Washington D.C. alongside weapons and ammunition used by the military in past conflicts all over the globe.

Appearances
The M199 is mentioned only in Fallout 3.